Dws Money Market Trust - Post-Effective Amendment (investment company, rule 485(b)) (485BPOS)

Filed electronically with the Securities and Exchange
Commission on April 29, 2008

File No. 2-78122
File No. 811-3495

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

Post-Effective Amendment No. 45

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

Amendment No. 41

DWS MONEY MARKET TRUST
(Exact name of Registrant as Specified in Charter)

345 Park Avenue, New York, NY 10154
(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, including Area Code: (617) 295-1000 Caroline Pearson
Deutsche Investment Management Americas Inc.
Two International Place, Boston MA 02110
(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box):

/_/ Immediately upon filing pursuant to paragraph (b)
/X/ On May 1, 2008 pursuant to paragraph (b)
/_/ 60 days after filing pursuant to paragraph (a)(1)
/_/ On _____________ pursuant to paragraph (a)(1)
/_/ 75 days after filing pursuant to paragraph (a)(2)
/_/ On ____________ pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

/_/ This post-effective amendment designates a new effective date for a
previously filed post-effective amendment.

EXPLANATORY NOTE

This post-effective amendment contains the prospectuses and Statement of Additional Information relating to the following series of the registrant:

o DWS Money Market Series: Premium Class S Shares, Prime Reserve Class S Shares, Managed Shares and Institutional Shares

This post-effective amendment is not intended to update or amend any other prospectuses or Statement of Additional Information of the registrant's other series or classes.

MAY 1, 2008

PROSPECTUS
INSTITUTIONAL SHARES

DWS MONEY MARKET SERIES

As with all mutual funds, the Securities and Exchange Commission (SEC) does not approve or disapprove these shares or determine whether the information in this prospectus is truthful or complete. It is a criminal offense for anyone to inform you otherwise.

ONE GLOBAL FORCE. ONE FOCUS. YOU. [DWS SCUDDER Logo]
Deutsche Bank Group

CONTENTS

HOW THE FUND WORKS
 4 The Fund's Main Investment
 Strategy
 6 The Main Risks of Investing in
 the Fund
 9 The Fund's Performance
 History
 10 How Much Investors Pay
 12 Other Policies and Risks
 12 Who Manages and Oversees
 the Fund
 15 Financial Highlights

HOW TO INVEST IN THE FUND
 17 How to Buy Shares
 18 How to Sell Shares
 19 Policies You Should Know
 About
 31 Understanding Distributions
 and Taxes
 33 Appendix

HOW THE FUND WORKS

On the next few pages, you'll find information about the fund's investment objective, the main strategies it uses to pursue that objective and the main risks that could affect performance.

Whether you are considering investing in the fund or are already a shareholder, you'll want to LOOK THIS INFORMATION OVER CAREFULLY. You may want to keep it on hand for reference as well.

Remember that mutual funds are investments, not bank deposits. They're not insured or guaranteed by the FDIC or any other government agency. Their share prices will go up and down, and you could lose money by investing in them.

You can find all Institutional DWS money fund prospectuses on the Internet at WWW.MONEYFUNDS.DEAM-US.DB.COM (the Web site does not form a part of this prospectus).

 Institutional Shares
ticker symbol ICAXX
 fund number 2403

 DWS MONEY MARKET SERIES

THE FUND'S MAIN INVESTMENT STRATEGY

The fund is a feeder fund that invests substantially all of its assets in a "master portfolio," the Cash Management Portfolio (the "Portfolio"), which will invest directly in securities and other instruments. References to the fund may refer to actions undertaken by the Portfolio.

The fund's goal is to seek a high level of current income consistent with liquidity and the preservation of capital. The fund, through the Portfolio, seeks to achieve its goal by investing in high quality short-term money market instruments.

While the fund's Advisor gives priority to earning income and maintaining the value of the fund's principal at $1.00 per share, all money market instruments, including US government obligations, can change in value when interest rates change or an issuer's creditworthiness changes.

The fund maintains a dollar-weighted average maturity of 90 days or less. The fund is managed in accordance with Rule 2a-7 under the Investment Company Act of 1940, as amended.

The fund follows policies designed to maintain a stable share price:

- Fund securities are valued in US dollars and have remaining maturities of 397 days (about 13 months) or less at the time of purchase. The fund may also invest in securities that have features that have the effect of reducing their maturities to 397 days or less at the time of purchase

- The fund buys US government debt obligations, money market instruments and other debt obligations that at the time of purchase:

- have received one of the two highest short-term ratings from two nationally recognized statistical rating organizations (NRSROs) or one NRSRO if that NRSRO is the only NRSRO that rates such obligations;

4 | DWS Money Market Series

- are unrated, but are deemed by the Advisor to be of comparable quality to one of the two highest short-term ratings; or

- have no short-term rating, but are rated in one of the top three highest long-term rating categories by a NRSRO or are deemed by the Advisor to be of comparable quality.

Principal investments

The fund invests in the following investments through the Portfolio.

The fund may invest in high quality, short-term, US dollar denominated money market instruments paying a fixed, variable or floating interest rate. These include:

- Debt obligations issued by US and foreign banks, financial institutions, corporations or other entities, including certificates of deposit, euro-time deposits, commercial paper (including asset-backed commercial paper), notes, funding agreements and US government securities. Securities that do not satisfy the maturity restrictions for a money market fund may be specifically structured so that they are eligible investments for money market funds. For example, some securities have features which have the effect of shortening the security's maturity.

- US government securities that are issued or guaranteed by the US Treasury, or by agencies or instrumentalities of the US government.

- Repurchase agreements, which are agreements to buy securities at one price, with a simultaneous agreement to sell back the securities at a future date at an agreed-upon price.

- Asset-backed securities, which are generally participations in a pool of assets whose payment is derived from the payments generated by the underlying assets. Payments on the asset-backed security generally consist of interest and/ or principal.

Under normal market conditions the fund will invest more than 25% of its total assets in the obligations of banks and other financial institutions.

DWS Money Market Series | 5

The fund may invest up to 10% of its total assets in other money market mutual funds in accordance with applicable regulations.

Working in consultation with the portfolio managers, a credit team screens potential securities and develops a list of those that the fund may buy. The portfolio managers, looking for attractive yield and weighing considerations such as credit quality, economic outlooks and possible interest rate movements, then decide which securities on this list to buy. The portfolio managers may adjust the fund's exposure to interest rate risk, typically seeking to take advantage of possible rises in interest rates and to preserve yield when interest rates appear likely to fall.

THE MAIN RISKS OF INVESTING IN THE FUND

There are several risk factors that could reduce the yield you get from the fund or cause the fund's performance to trail that of other investments.

The fund is exposed to the risk factors below even though the Portfolio, not the fund, invests directly in the individual securities.

INTEREST RATE RISK. Money market instruments, like all debt securities, face the risk that the securities will decline in value because of changes in interest rates. Generally, investments subject to interest rate risk will decrease in value when interest rates rise and increase in value when interest rates decline. To minimize such price fluctuations, the fund limits the dollar-weighted average maturity of the securities held by the fund to 90 days or less. Generally, the price of short-term investments fluctuates less than longer-term investments. Income earned on floating or variable rate securities may vary as interest rates decrease or increase.

CREDIT RISK. A money market instrument's credit quality depends on the issuer's ability to pay interest on the security and repay the debt; the lower the credit rating, the greater the risk that the security's issuer will default, or fail to meet its payment obligations. The credit risk of a security may also depend on the credit quality of any bank or financial institution that provides credit enhancement for it. To minimize credit risk, the fund only buys high quality securities. Also, the fund only buys securities with remaining maturities of 397 days (approximately 13 months) or less. This reduces the risk that

6 | DWS Money Market Series

the issuer's creditworthiness will change, or that the issuer will default on the principal and interest payments of the obligation. Additionally, some securities issued by US government agencies or instrumentalities are supported only by the credit of that agency or instrumentality. There is no guarantee that the US government will provide support to such agencies or instrumentalities and such securities may involve risk of loss of principal and interest. Securities that rely on third party guarantors to raise their credit quality could fall in price or go into default if the financial condition of the guarantor deteriorates.

MARKET RISK. Although individual securities may outperform the market, the entire market may decline as a result of rising interest rates, regulatory developments or deteriorating economic conditions.

SECURITY SELECTION RISK. While the fund invests in short-term securities, which by their nature are relatively stable investments, the risk remains that the securities in which the fund invests will not perform as expected. This could cause the fund's returns to lag behind those of similar money market mutual funds.

REPURCHASE AGREEMENT RISK. A repurchase agreement exposes the fund to the risk that the party that sells the securities may default on its obligation to repurchase them. In this circumstance, the fund can lose money because:

- it cannot sell the securities at the agreed-upon time and price; or

- the securities lose value before they can be sold.

The fund seeks to reduce this risk by monitoring the creditworthiness of the sellers with whom it enters into repurchase agreements. The fund also monitors the value of the securities to ensure that they are at least equal to the total amount of the repurchase obligations, including interest and accrued interest.

CONCENTRATION RISK. Because the fund will invest more than 25% of its total assets in the obligations of banks and other financial institutions, it may be vulnerable to setbacks in that industry. Banks and other financial institutions are highly dependent on short-term interest rates and can be adversely affected by downturns in the US and foreign economies or changes in banking regulations.

DWS Money Market Series | 7

PREPAYMENT RISK. A bond issuer, such as an issuer of asset-backed securities, may retain the right to pay off a high yielding bond before it comes due. In that event, the fund may have to reinvest the proceeds at lower interest rates. Thus, prepayment may reduce the fund's income. It may also create a capital gains tax liability, because bond issuers usually pay a premium for the right to pay off bonds early.

FOREIGN INVESTMENT RISK. The fund may invest in money market instruments of foreign issuers that are denominated in US dollars. Foreign investments involve certain special risks, such as unfavorable political and legal developments, limited financial information, regulatory risk and economic and financial instability.

An investment in the fund is not insured or guaranteed by the FDIC or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, this share price isn't guaranteed and you could lose money by investing in the fund.

8 | DWS Money Market Series

THE FUND'S PERFORMANCE HISTORY

While a fund's past performance isn't necessarily a sign of how it will do in the future, it can be valuable for an investor to know.

The bar chart shows how the performance of the fund has varied from year to year, which may give some idea of risk. The table shows how the fund's returns over different periods average out. The "total return" of a fund is the change in the value of an investment in the fund over a given period. Average annual returns are calculated by averaging the year-by-year returns of the fund over a given period. All figures include the effects of the fund's expenses and assume reinvestment of dividends and distributions. As always, past performance is no guarantee of future results.

The 7-DAY YIELD, which is often referred to as the "current yield," is the income generated by the fund over a seven-day period. This amount is then annualized, which means that we assume the fund generates the same income every week for a year. To learn the current yield, investors may call (800) 730-1313.

Effective July 30, 2007, some of the fund's investment strategies changed. The fund's past performance would have been different if the fund was managed using the current strategies.

DWS Money Market Series

ANNUAL TOTAL RETURN (%) AS OF 12/31 EACH YEAR - Institutional Shares
[GRAPHIC APPEARS HERE]

 5.52 5.26 6.52 4.14 1.74 1.09 1.30 3.19 5.05 5.34
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007

2008 TOTAL RETURN AS OF MARCH 31: 0.98%
FOR THE PERIODS INCLUDED IN THE BAR CHART:
BEST QUARTER: 1.68%, Q4 2000 WORST QUARTER: 0.24%, Q3 2003

AVERAGE ANNUAL TOTAL RETURNS (%) as of 12/31/2007

 1 YEAR 5 YEARS 10 YEARS
Institutional Shares 5.34 3.18 3.90

Total returns would have been lower if operating expenses hadn't been reduced.

DWS Money Market Series | 9

HOW MUCH INVESTORS PAY

The table below describes the fees and expenses that you may pay if you buy and hold fund shares. This information doesn't include any fees that may be charged by your financial advisor.

 INSTITUTIONAL
FEE TABLE SHARES
 SHAREHOLDER FEES, paid directly from
 your investment None
______________________________________

 ANNUAL OPERATING EXPENSES, deducted
 from fund assets
______________________________________ _____
 Management Fee1 0.13%
 Distribution/Service (12b-1) Fee None
 Other Expenses2 0.14
 TOTAL ANNUAL OPERATING EXPENSES3 0.27
 Less Fee Waiver/Expense
 Reimbursement4,5 0.12
 NET ANNUAL OPERATING EXPENSES6 0.15

1 Effective July 30, 2007 the fund became a feeder fund of Cash Management Portfolio. The management fee is paid at the Portfolio level. Restated on an annualized basis to reflect fee changes that took place on August 1, 2007.

2 "Other Expenses" include an administrative services fee paid to the Advisor in the amount of 0.10% from the fund and 0.03% from the Portfolio.

3 Information on the annual operating expenses reflects the expenses of both the fund and the Master Portfolio, in which the fund invests its assets.

4 The Portfolio's Advisor has contractually agreed through July 29, 2010 to waive all or a portion of its management fee and reimburse or pay certain operating expenses (excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest expenses) to the extent necessary to maintain the annual expenses of the Portfolio at 0.15% of the Portfolio's average daily net assets. (A further discussion of the relationship between the fund and the Portfolio appears in the "Who Manages and Oversees the Fund - Organizational Structure" section of this prospectus.)

5 Through July 29, 2010, the Advisor has contractually agreed to waive all or a portion of its administrative services fee and reimburse or pay operating expenses of the fund to the extent necessary to maintain the fund's total operating expenses at 0.15% for Institutional Shares, excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest expenses.

6 Effective February 5, 2008, the Advisor has voluntarily agreed to waive 0.13% of the fund's total operating expenses. This voluntary waiver or reimbursement may be terminated at any time at the option of the Advisor.

10 | DWS Money Market Series

Based on the costs above (including one year of capped expenses in the "1 Year" period and two years of capped expenses in the "3 Years," "5 Years" and "10 Years" periods), this example helps you compare the expenses of the fund to those of other mutual funds. This example assumes operating expenses remain the same. It also assumes that you invested $10,000, earned 5% annual returns and reinvested all dividends and distributions and sold your shares at the end of each period. This is only an example; actual expenses will be different.

 1 YEAR 3 YEARS 5 YEARS 10 YEARS
Institutional Shares $15 $62 $127 $319

DWS Money Market Series | 11

OTHER POLICIES AND RISKS

While the previous pages describe the main points of the fund's strategy and risks, there are a few other issues to know about:

- Although major changes tend to be infrequent, the fund's Board could change the fund's investment objective without seeking shareholder approval.

For more information

This prospectus doesn't tell you about every policy or risk of investing in the fund.

If you want more information on the fund's allowable securities and investment practices and the characteristics and risks of each one, you may want to request a copy of the Statement of Additional Information (the back cover tells you how to do this).

Keep in mind that there is no assurance that the fund will achieve its objective.

A complete list of the fund's portfolio holdings is posted as of each month end on or after the 14th day of the following month on www.moneyfunds.deam-us.db.com (the Web site does not form a part of this prospectus). This posted information generally remains accessible at least until the date on which the fund files its Form N-CSR or N-Q with the Securities and Exchange Commission for the period that includes the date as of which the posted information is current. The fund may also post on the Web site, on a more frequent basis, a percentage breakdown of the holdings of the fund by type of security. The fund's Statement of Additional Information includes a description of the fund's policies and procedures with respect to the disclosure of the fund's portfolio holdings.

WHO MANAGES AND OVERSEES THE FUND

The investment advisor

Deutsche Investment Management Americas Inc. ("DIMA" or the "Advisor"), with headquarters at 345 Park Avenue, New York, NY 10154, is the investment advisor for the fund and the Portfolio. Under the oversight of the Board, the Advisor makes

12 | Other Policies and Risks

investment decisions, buys and sells securities for the fund and the Portfolio and conducts research that leads to these purchase and sale decisions. The Advisor provides a full range of global investment advisory services to institutional and retail clients.

DWS Scudder is part of Deutsche Asset Management, which is the marketing name in the US for the asset management activities of Deutsche Bank AG, DIMA, Deutsche Bank Trust Company Americas and DWS Trust Company.

Deutsche Asset Management is a global asset management organization that offers a wide range of investing expertise and resources, including hundreds of portfolio managers and analysts and an office network that reaches the world's major investment centers. This well-resourced global investment platform brings together a wide variety of experience and investment insight across industries, regions, asset classes and investing styles.

The Advisor is an indirect, wholly owned subsidiary of Deutsche Bank AG. Deutsche Bank AG is a major global banking institution that is engaged in a wide range of financial services, including investment management, mutual funds, retail, private and commercial banking, investment banking and insurance.

MANAGEMENT FEE. The Advisor receives a management fee from the Portfolio. Pursuant to the master/feeder structure noted earlier in this prospectus, for the most recent fiscal year, the Portfolio paid 0.10% (reflects the effects of expense limitations and/or fee waivers then in effect) as a percentage of average daily net assets.

Effective August 1, 2007, the Portfolio pays the Advisor a fee, calculated daily and paid monthly, at the annual rate of 0.150% of the first $3 billion of the Portfolio's average daily net assets, 0.1325% on the next $4.5 billion of the Portfolio's average daily net assets, and 0.120% thereafter. The Advisor received a management fee from the fund for the period from June 1, 2007 through July 29, 2007. The management fee paid by the fund for the most recent fiscal year was 0.00% of the fund's average daily net assets, which reflects the effect of expense limitations and/or fee waivers then in effect.

Who Manages and Oversees the Fund | 13

A discussion regarding the basis for the Board's approval of the investment management agreements for the Portfolio and the fund, respectively, is contained in the most recent shareholder report for the annual period ended December 31 (see "Shareholder reports" on the back cover).

Under a separate administrative services agreement between the fund and the Advisor, the fund pays the Advisor for providing most of the fund's administrative services. In addition, the Portfolio has a separate administrative services agreement with the Advisor pursuant to which the Portfolio pays the Advisor for certain administrative services.

ORGANIZATIONAL STRUCTURE. The fund is a "feeder fund" that invests substantially all of its assets in a "master portfolio." The fund and the Portfolio have the same investment objective. The Portfolio is advised by DIMA. The Portfolio may accept investments from other feeder funds. Each feeder fund bears the Portfolio's expenses in proportion to that feeder fund's assets. Each feeder fund can set its own transaction minimums, fund-specific expenses and other conditions. The fund's board members may determine to withdraw the fund's assets from the Portfolio if they believe doing so is in the shareholders' best interests. If the board members withdraw the fund's assets, they would then consider whether the fund should hire its own investment advisor, invest in a different master portfolio or take other action.

The portfolio managers

A group of investment professionals is responsible for the day-to-day management of the fund. These investment professionals have a broad range of experience managing money market funds.

14 | Who Manages and Oversees the Fund

FINANCIAL HIGHLIGHTS

The financial highlights are designed to help you understand recent financial performance. The figures in the first part of the table are for a single share. The total return figures represent the percentage that an investor in the fund would have earned (or lost), assuming all dividends and distributions were reinvested. This information has been audited by PricewaterhouseCoopers LLP, independent registered public accounting firm, whose report, along with the fund's financial statements, is included in the fund's annual report (see "Shareholder reports" on the back cover).

DWS Money Market Series - Institutional Shares

YEARS ENDED DECEMBER 31, 2007a 2007c 2006c 2005c 2004c 2003c
SELECTED PER SHARE DATA
--------------------------------------------------------------------------------------- -
NET ASSET VALUE, BEGINNING
OF PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------ ------- ------- ------- ------- -------
 Net investment income .030 .052 .039 .020 .010 .015
______________________________ _______ ________ ________ ________ ________ ________
 Distributions from net
 investment income ( .030) ( .052) ( .039) ( .020) ( .010) ( .015)
------------------------------ ------- -------- -------- -------- -------- --------
NET ASSET VALUE, END OF
PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------- -------- -------- -------- -------- --------
Total Return (%)b 3.08** 5.37 4.02 1.98 .99 1.50
------------------------------ ------- -------- -------- -------- -------- --------

RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA
--------------------------------------------------------------------------------------- --------
Net assets, end of period
($ millions) 21,262 17,469 8,637 12,214 8,646 9,261
______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses before
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .26* .24 .28 .27 .34 .35
______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses after
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .12* .10 .12 .13 .15 .15
______________________________ _______ ________ ________ ________ ________ ________
Ratio of net investment
income (%) 5.18* 5.26 3.89 1.99 .99 1.44
------------------------------ ------- -------- -------- -------- -------- --------

a For the period from June 1, 2007 through December 31, 2007. The fund changed its fiscal year end from May 31 to December 31.

b Total returns would have been lower had certain expenses not been reduced.

c For the years ended May 31.

d On July 30, 2007, DWS Money Market Series became a feeder of Cash Management Portfolio. Expense ratios disclosed prior to December 31, 2007 are for DWS Money Market Series as a stand-alone fund.

* Annualized

** Not annualized

Financial Highlights | 15

HOW TO INVEST IN THE FUND

THE FOLLOWING PAGES TELL YOU HOW TO INVEST IN THE FUND AND WHAT TO EXPECT AS A SHAREHOLDER. The following pages also tell you about many of the services, choices and benefits of being a shareholder. You'll also find information on how to check the status of your account using the method that's most convenient for you.

If you're investing directly with DWS Scudder, all of this information applies to you. If you're investing through a "third party provider" - for example, a workplace retirement plan, financial supermarket or financial advisor - your provider may have its own policies or instructions and you should follow those.

You can find out more about the topics covered here by speaking with your FINANCIAL ADVISOR OR A REPRESENTATIVE OF YOUR WORKPLACE RETIREMENT PLAN OR OTHER INVESTMENT PROVIDER.

How to BUY Shares

FIRST INVESTMENT ADDITIONAL INVESTMENTS
$1,000,000 or more for all accounts No minimum amount
BY REGULAR, EXPRESS, REGISTERED OR
CERTIFIED MAIL
- Fill out and sign a purchase - Send a check and a letter with your
 application name, account number, the full name
- Send it to us at the address below, of the fund and class, and your
 along with an investment check made investment instructions to us at the
 out to the complete fund and class address on the left
 name
 Mail to:
 DWS Scudder Investments Service
 Company, Institutional Money Funds-
 Client Services
 PO Box 219210
 Kansas City, MO
 64121-9210
BY WIRE
- Call (800) 730-1313 to open an account - Please contact your financial advisor
 and get an account number for wire instructions on purchase
 orders
- Please contact your financial advisor
 for wire instructions on purchase
 orders
- Complete a purchase application and
 send it to us at the address below
E-MAIL ADDRESS -
ifunds@dws.com

How to Buy Shares | 17

How to SELL Shares

 BY EXPEDITED REDEMPTION SERVICE
 If Expedited Redemption Service has been elected on the Purchase
Application on
 file with the Transfer Agent, redemption of shares may be requested
by:
 - telephoning Client Services at (800) 730-1313
 BY MAIL OR EXPRESS MAIL
 Write a letter that includes:
 - the fund, class, and account number from which you want to sell
shares
 - the dollar amount or number of shares you want to sell
 - your name(s), signature(s), and address, as they appear on your
account
 - a daytime telephone number
 Mail the letter to:
 DWS Scudder Investments Service Company
 Institutional Money Funds-Client Services
 PO Box 219210
 Kansas City, MO
 64121-9210
 BY PHONE
 - Call (800) 730-1313 for instructions

18 | How to Sell Shares

POLICIES YOU SHOULD KNOW ABOUT

Along with the information on the previous pages, the policies below may affect you as a shareholder. Some of this information, such as the section on distributions and taxes, applies to all investors, including those investing through a financial advisor.

If you are investing through a financial advisor or through a retirement plan, check the materials you received from them about how to buy and sell shares because particular financial advisors or other intermediaries may adopt policies, procedures or limitations that are separate from those described by the fund. Please note that a financial advisor may charge fees separate from those charged by the fund and may be compensated by the fund.

Keep in mind that the information in this prospectus applies only to the shares offered herein. Other share classes are described in separate prospectuses and have different fees, requirements and services.

In order to reduce the amount of mail you receive and to help reduce expenses, we generally send a single copy of any shareholder report and prospectus to each household. If you do not want the mailing of these documents to be combined with those for other members of your household, please contact your financial advisor or call (800) 730-1313.

Financial intermediary support payments

The Advisor, DWS Scudder Distributors, Inc. (the "Distributor") and/or their affiliates may pay additional compensation, out of their own assets and not as an additional charge to the fund, to selected financial advisors in connection with the sale and/or distribution of fund shares or the retention and/or servicing of fund investors and fund shares ("revenue sharing"). Such revenue sharing payments are in addition to any distribution or service fees payable under any Rule 12b-1 or service plan of the fund, any record keeping/sub-transfer agency/networking fees payable by the fund (generally through the Distributor or an affiliate) and/or the Distributor to certain financial advisors for performing such services and any sales charge, commissions, non-cash compensation arrangements expressly permitted under applicable rules of the Financial Industry Regulatory Authority or other concessions described in the fee table or elsewhere in this prospectus or the Statement of Additional Information as

Policies You Should Know About | 19

payable to all financial advisors. For example, the Advisor, the Distributor and/or their affiliates may compensate financial advisors for providing the fund with "shelf space" or access to a third party platform or fund offering list or other marketing programs, including, without limitation, inclusion of the fund on preferred or recommended sales lists, mutual fund "supermarket" platforms and other formal sales programs; granting the Distributor access to the financial advisor's sales force; granting the Distributor access to the financial advisor's conferences and meetings; assistance in training and educating the financial advisor's personnel; and obtaining other forms of marketing support.

The level of revenue sharing payments made to financial advisors may be a fixed fee or based upon one or more of the following factors:
gross sales, current assets and/or number of accounts of the fund attributable to the financial advisor, the particular fund or fund type or other measures as agreed to by the Advisor, the Distributor and/or their affiliates and the financial advisors or any combination thereof. The amount of these revenue sharing payments is determined at the discretion of the Advisor, the Distributor and/or their affiliates from time to time, may be substantial, and may be different for different financial advisors based on, for example, the nature of the services provided by the financial advisor.

The Advisor, the Distributor and/or their affiliates currently make revenue sharing payments from their own assets in connection with the sale and/or distribution of DWS Fund shares or the retention and/or servicing of investors and DWS Fund shares to financial advisors in amounts that generally range from .01% up to .50% of assets of the fund serviced and maintained by the financial advisor, .10% to .25% of sales of the fund attributable to the financial advisor, a flat fee of $13,350 up to $500,000, or any combination thereof. These amounts are subject to change at the discretion of the Advisor, the Distributor and/or their affiliates. Receipt of, or the prospect of receiving, this additional compensation may influence your financial advisor's recommendation of the fund or of any particular share class of the fund. You should review your financial advisor's compensation disclosure and/or talk to your financial advisor to obtain more information on how this compensation may have influenced your financial advisor's recommendation of the fund. Additional information regarding these revenue sharing payments is

20 | Policies You Should Know About

included in the fund's Statement of Additional Information, which is available to you on request at no charge (see the back cover of this prospectus for more information on how to request a copy of the Statement of Additional Information).

The Advisor, the Distributor and/or their affiliates may also make such revenue sharing payments to financial advisors under the terms discussed above in connection with the distribution of both DWS funds and non-DWS funds by financial advisors to retirement plans that obtain record keeping services from ADP, Inc. on the DWS Scudder branded retirement plan platform (the "Platform") with the level of revenue sharing payments being based upon sales of both the DWS funds and the non-DWS funds by the financial advisor on the Platform or current assets of both the DWS funds and the non-DWS funds serviced and maintained by the financial advisor on the Platform.

It is likely that broker-dealers that execute portfolio transactions for the fund will include firms that also sell shares of the DWS funds to their customers. However, the Advisor will not consider sales of DWS fund shares as a factor in the selection of broker-dealers to execute portfolio transactions for the DWS funds. Accordingly, the Advisor has implemented policies and procedures reasonably designed to prevent its traders from considering sales of DWS fund shares as a factor in the selection of broker-dealers to execute portfolio transactions for the fund. In addition, the Advisor, the Distributor and/or their affiliates will not use fund brokerage to pay for their obligation to provide additional compensation to financial advisors as described above.

Policies about transactions

To help the government fight the funding of terrorism and money laundering activities, federal law requires all financial institutions to obtain, verify and record information that identifies each person who opens an account. What this means to you:
When you open an account, we will ask for your name, address, date of birth and other information that will allow us to identify you. Some or all of this information will be used to verify the identity of all persons opening an account.

Policies You Should Know About | 21

We might request additional information about you (which may include certain documents, such as articles of incorporation for companies) to help us verify your identity and, in some cases, the information and/or documents may be required to conduct the verification. The information and documents will be used solely to verify your identity.

We will attempt to collect any missing required and requested information by contacting you or your financial advisor. If we are unable to obtain this information within the time frames established by the fund, then we may reject your application and order.

The fund will not invest your purchase until all required and requested identification information has been provided and your application has been submitted in "good order." After we receive all the information, your application is deemed to be in good order and we accept your purchase, you will receive the net asset value per share next calculated.

If we are unable to verify your identity within time frames established by the fund, after a reasonable effort to do so, you will receive written notification.

With certain limited exceptions, only US residents may invest in the fund.

Because orders placed through a financial advisor must be forwarded to the transfer agent before they can be processed, you'll need to allow extra time. Your financial advisor should be able to tell you approximately when your order will be processed. It is the responsibility of your financial advisor to forward your order to the transfer agent in a timely manner.

TRANSACTION PROCESSING. Except as provided below, purchase, redemption and exchange orders must be received in good order by 4:00 p.m. Eastern time (or prior to the close of the fund, if the New York Stock Exchange closes early on such date) on a business day on which the fund is open in order to be effective on that day; otherwise such orders will be effective on the next business day. However, on a normal business day that the fund calculates its share price at 5:00 p.m. Eastern time as provided below, purchase orders with payment sent by wire and redemption orders with proceeds to be sent by wire, ACH or by

22 | Policies You Should Know About

check that are communicated by telephone (but not by the Automated Information Line) and are received in good order by 5:00 p.m. Eastern time on a business day will be effective on that business day.

Orders for the purchase of shares by wire transfer will normally be effective at the share price next computed after receipt of the wire transfer of the amount to be invested. If a wire transfer purchase order is received in good order before 5:00 p.m. Eastern time, it will normally receive the dividend for that day.

Shareholders known to the fund may notify Institutional Investment Services in advance of their wire transfer purchase by calling Institutional Investment Services prior to the 5:00 p.m. Eastern time cut-off time and providing the amount of the order. The investor will receive a confirmation number for the trade. If the fund receives the wire transfer before the close of the Federal Funds wire system, the trade will be entitled to that day's dividend. If the fund does not receive the wire transfer by the close of the Federal Funds wire system, the trade may not receive the dividend for that day and, depending upon the circumstances, the trade may receive the dividend for the following business day or may be canceled or rejected and, in any case, the investor may be charged for any losses or fees that result, which may be paid by deductions from their account or otherwise. The fund's Distributor may refuse to allow any investor to trade with the fund in this manner and may require that the wire transfer of purchase proceeds be received before the trade is considered in good order.

Investments by check will be effective on the business day following receipt and will earn dividends the following business day. If you pay for shares by check and the check fails to clear, we have the right to cancel your order, hold you liable or charge you or your account for any losses or fees the fund or its agents have incurred.

Orders processed through dealers or other financial services firms via Fund/SERV will be effected at the share price calculated on the trade day (normally the date the order is received). Purchases processed via Fund/SERV will begin earning dividends on the day the fund receives the payment (typically the next business day). For redemptions processed via Fund/SERV, you generally will receive dividends accrued up to, but not including, the business day that payment for your shares is made.

Policies You Should Know About | 23

When selling shares, shareholders generally receive dividends up to, but not including, the business day following the day on which the shares were sold. To sell shares, you must state whether you would like to receive the proceeds by wire or check.

To sell by wire, contact Institutional Investment Services before 5:00 p.m. Eastern time. After you inform Institutional Investment Services of the amount of your redemption, you will receive a trade confirmation number. If the fund receives a sell request before 5:00
p.m. Eastern time and the request calls for proceeds to be sent out by wire, the proceeds will normally be wired on the same day. However, the shares sold will not earn that day's dividend.

As noted elsewhere in the prospectus, proceeds of a redemption may be delayed. The ability to receive "same day" wire redemption proceeds can be affected by a variety of circumstances including the time that the request is made, the level of redemption requests and purchase orders and general market conditions. Requests for same day wire that are received earlier in the day will be given priority over requests received later in the day in the event that it is necessary to limit the amount of same day wire redemptions.

Your initial investment must be for at least $1,000,000. There are no minimum subsequent investment requirements.

The minimum initial investment is waived for:

- Shareholders with existing accounts prior to August 13, 2004 who met the previous minimum investment eligibility requirement.

- Investment advisory affiliates of Deutsche Bank Securities, Inc., DWS funds or Deutsche funds purchasing shares for the accounts of their investment advisory clients.

- Employee benefit plans with assets of at least $50 million.

- Clients of the private banking division of Deutsche Bank AG.

- Institutional clients and qualified purchasers that are clients of a division of Deutsche Bank AG.

- A current or former director or trustee of the Deutsche or DWS funds.

24 | Policies You Should Know About

- An employee, the employee's spouse or life partner and children or stepchildren age 21 or younger of Deutsche Bank or its affiliates or a subadvisor to any fund in the DWS family of funds or a broker-dealer authorized to sell shares of the funds.

- Registered investment advisors who trade through platforms approved by the Advisor and whose client assets in the fund in the aggregate meet (or, in the Advisor's judgment, will meet within a reasonable period of time) the $1,000,000 minimum investment.

The fund reserves the right to modify the above eligibility requirements and investment minimum at any time.

SUB-MINIMUM BALANCES. The fund may close your account and send you the proceeds if your balance falls below $1,000,000; we will give you 60 days' notice so you can either increase your balance or close your account (these policies don't apply to most retirement accounts).

For more information on how to buy or sell shares by mail, refer to "Policies about transactions - Transaction Processing" below.

WIRE:

BUYING: You may buy shares by wire only if your account is authorized to do so. Instruct your bank to send payment by wire using the wire instructions below.

BANK NAME: State Street Bank Boston
ROUTING NO: 011000028
ATTN: DWS Scudder
DDA NO: 99028102
FBO: (Account name) (Account number)
CREDIT: (Fund name, Fund number and, if applicable, class
 name) (Refer to the start of "The Fund's Main
 Investment Strategy" above for the fund number.)

Refer to your account statement for the account name and number. Wire transfers normally take two or more hours to complete. Wire transfers may be restricted on holidays and at certain other times.

Policies You Should Know About | 25

SELLING: You may sell shares by wire only if your account is authorized to do so. You will be paid for redeemed shares by wire transfer of funds to your financial advisor or bank upon receipt of a duly authorized redemption request as promptly as feasible. For your protection, you may not change the destination bank account over the phone.

For more information on how to buy or sell shares by wire, refer to "Policies about transactions - Transaction Processing" below.

TELEPHONE AND ELECTRONIC TRANSACTIONS. Generally, you are automatically entitled to telephone and electronic transaction privileges, but you may elect not to have them when you open your account or by contacting Institutional Investment Services at (800) 730-1313 at a later date.

Since many transactions may be initiated by telephone or electronically, it's important to understand that as long as we take reasonable steps to ensure that an order to purchase or redeem shares is genuine, such as recording calls or requesting personalized security codes or other information, we are not responsible for any losses that may occur as a result. For transactions conducted over the Internet, we recommend the use of a secure Internet browser. In addition, you should verify the accuracy of your confirmation statements immediately after you receive them.

REGULAR INVESTMENTS AND WITHDRAWALS enable you to set up a link between the fund account and a bank account. Once this link is in place, you can move money between the two with a phone call. You'll need to make sure your bank has Automated Clearing House (ACH) services. Transactions take two to three days to be completed.

EXPEDITED REDEMPTIONS. Expedited Redemption Service allows you to have proceeds from your sales of fund shares wired directly to a bank account. To use this service, you'll need to designate the bank account in advance. Follow the instructions on your application.

THE FUND DOES NOT ISSUE SHARE CERTIFICATES. However, if you currently have shares in certificated form, you must include the share certificates properly endorsed or accompanied by a duly executed stock power when exchanging or redeeming shares. You may not exchange or redeem shares in certificate form by telephone or via the Internet.

26 | Policies You Should Know About

THE FUND ACCEPTS PAYMENT FOR SHARES ONLY IN US DOLLARS by check, bank or Federal Funds wire transfer or by electronic bank transfer. Please note that the fund does not accept cash, money orders, traveler's checks, starter checks, third party checks (except checks for retirement plan asset transfers and rollovers or for Uniform Gifts to Minors Act/Uniform Transfers to Minors Act accounts), checks drawn on foreign banks or checks issued by credit card companies or Internet-based companies. Thus, subject to the foregoing exceptions for certain third party checks, checks that are otherwise permissible must be drawn by the account holder on a domestic bank and must be payable to the fund.

SIGNATURE GUARANTEE. When you want to sell more than $100,000 worth of shares or send proceeds to a third party or to a new address, you'll usually need to place your order in writing and include a signature guarantee. However, if you want money wired to a bank account that is already on file with us, you don't need a signature guarantee. Also, generally you don't need a signature guarantee for an exchange, although we may require one in certain other circumstances.

A signature guarantee is simply a certification of your signature - a valuable safeguard against fraud. You can get a signature guarantee from an eligible guarantor institution, including commercial banks, savings and loans, trust companies, credit unions, member firms of a national stock exchange or any member or participant of an approved signature guarantor program. Note that you can't get a signature guarantee from a notary public and we must be provided the original guarantee.

SELLING SHARES OF TRUST ACCOUNTS AND BUSINESS OR ORGANIZATION ACCOUNTS may require additional documentation. Please call (800) 730-1313 or contact your financial advisor for more information.

Policies You Should Know About | 27

are selling shares recently purchased by check or ACH or in the event of closing of the Federal Reserve wire payment system. The fund reserves the right to suspend or postpone redemptions as permitted pursuant to Section 22(e) of the Investment Company Act of 1940. Generally, those circumstances are when 1) the New York Stock Exchange is closed other than customary weekend or holiday closings;
2) trading on the New York Stock Exchange is restricted; 3) an emergency exists which makes the disposal of securities owned by the fund or the fair determination of the value of the fund's net assets not reasonably practicable; or 4) the SEC, by order, permits the suspension of the right of redemption. Redemption payments by wire may also be delayed in the event of a non-routine closure of the Federal Reserve wire payment system. For additional rights reserved by the fund, please see "Other rights we reserve."

You may obtain additional information about other ways to sell your shares by contacting your financial advisor.

SHORT-TERM TRADING. Since money market funds hold short-term instruments and are intended to provide liquidity to shareholders, the Advisor does not monitor or limit short-term or excessive trading activity in the fund and, accordingly, the Board of the fund has not approved any policies and procedures designed to limit this activity. However, the fund reserves the right to and may reject or cancel a purchase or exchange order into the fund for any reason, including if, in the opinion of the Advisor, there appears to be a pattern of short-term or excessive trading by an investor in another DWS fund.

How the fund calculates share price

To calculate net asset value, or NAV, each share class uses the following equation:

 TOTAL ASSETS - TOTAL LIABILITIES
----------------------------------------- = NAV
 TOTAL NUMBER OF SHARES OUTSTANDING

The price at which you buy and sell shares is based on the NAV per share next calculated after the order is received by the transfer agent.

28 | Policies You Should Know About

IN VALUING SECURITIES, we typically use amortized cost (the method used by most money market funds) to account for any premiums or discounts above or below the face value of any securities the fund buys, and round the per share NAV to the nearest whole cent.

THE FUND IS OPEN FOR BUSINESS each day the New York Stock Exchange (the "Exchange") is open. Normally, the fund calculates its share price once every business day at 5:00 p.m. Eastern time. The close of regular trading on the Exchange is typically 4:00 p.m. Eastern time, but sometimes earlier, as in the case of scheduled half-day trading or unscheduled suspensions of trading. In the event of scheduled partial day trading or unscheduled suspensions of trading on the Exchange, the calculation of share price shall be as of the close of trading on the Exchange. In such instances, the latest time for receipt of wire purchase transactions entitled to receive same day dividend treatment and for receipt of redemption orders for same day wire transfer of proceeds will be the earlier of (a) 5:00 p.m. Eastern time or (b) the early closing time of the Exchange. The fund seeks to maintain a stable $1.00 share price.

The fund may, but is not required to, accept certain types of purchase and redemption orders (not including exchanges) on days that the Exchange is closed, or beyond an Exchange early closing time (referred to as a "Limited Trading Period") if: (a) the Federal Reserve system is open, (b) the primary trading markets for the fund's portfolio instruments are open and (c) the Advisor believes there will be adequate liquidity in the short-term markets. During any such Limited Trading Period, the fund will only accept purchase orders by wire with advance telephone notification and telephone redemption orders with proceeds to be sent by wire, ACH or check and will not accept orders by any other means. (Automated Telephone Line orders are not permitted.) If redemption proceeds are requested by ACH or check, the transmission of the ACH payment or the mailing of the check, as the case may be, will be delayed by at least one business day in comparison to normal trading periods. Orders submitted by other means will be processed on the next day that the Exchange is open. The calculation of share price will be as set forth in the prospectus for normal trading days. Orders must be submitted by the cut-off times for receipt of wire purchases entitled to that day's dividend and for receipt of telephone redemption orders for same day wire transfer, which will be the earlier of: (a) the times set forth in the prospectus for

Policies You Should Know About | 29

normal trading days or (b) such earlier times that the fund determines based on the criteria described above. If redemption proceeds are requested by ACH or check, orders must be received prior to the calculation of share price. Please call (877) 237-1131 or visit our Web site at www.moneyfunds.deam-us.db.com for additional information about whether the fund will be open for business on a particular day. Information concerning the intention of the fund to be open for a Limited Trading Period will be available at least one business day prior to the applicable day that the Exchange is closed or is closing early in the case of scheduled closings and as soon as practical in the case of unscheduled closings.

Other rights we reserve

You should be aware that we may do any of the following:

- withdraw or suspend the offering of shares at any time

- withhold a portion of your distributions and redemption proceeds for federal income tax purposes if we have been notified by the IRS that you are subject to backup withholding or if you fail to provide us with a correct taxpayer ID number and certain certifications including certification that you are not subject to backup withholding

- reject a new account application if you don't provide any required or requested identifying information, or for any other reason

- refuse, cancel, limit or rescind any purchase or exchange order, without prior notice; freeze any account (meaning you will not be able to purchase fund shares in your account); suspend account services; and/or involuntarily redeem your account if we think that the account is being used for fraudulent or illegal purposes; one or more of these actions will be taken when, at our sole discretion, they are deemed to be in the fund's best interests or when the fund is requested or compelled to do so by governmental authority or by applicable law

30 | Policies You Should Know About

- close and liquidate your account if we are unable to verify your identity, or for other reasons; if we decide to close your account, your fund shares will be redeemed at the net asset value per share next calculated after we determine to close your account (less applicable redemption fee, if any); you may recognize a gain or loss on the redemption of your fund shares and you may incur a tax liability

- change, add or withdraw various services, fees and account policies (for example, we may adjust the fund's investment minimums at any time)

UNDERSTANDING DISTRIBUTIONS AND TAXES

The fund intends to distribute to its shareholders virtually all of its net earnings. The fund can earn money in two ways: by receiving interest, dividends or other income from securities it holds and by selling securities for more than it paid for them. (The fund's earnings are separate from any gains or losses stemming from your own purchase and sale of shares.) The fund may not always pay a dividend or distribution for a given period.

THE FUND'S INCOME DIVIDENDS ARE DECLARED DAILY AND PAID MONTHLY TO SHAREHOLDERS. The fund may take into account capital gains and losses (other than net long-term capital gains) in its daily dividend declarations. The fund may make additional distributions for tax purposes if necessary.

Dividends or distributions declared to shareholders of record in the last quarter of a given calendar year are treated for federal income tax purposes as if they were received on December 31 of that year, provided such dividends or distributions are paid by the end of the following January.

For federal income tax purposes, income and capital gains distributions are generally taxable to shareholders. However, dividends and distributions received by retirement plans qualifying for tax exemption under federal income tax laws generally will not be taxable.

THE FOLLOWING SIDEBAR TEXT APPEARS NEXT TO THE PRECEDING PARAGRAPHS

Because each shareholder's tax situation is unique, ask your tax professional about the tax consequences of your investments, including any state and local tax consequences.

Understanding Distributions and Taxes | 31

YOU CAN CHOOSE HOW TO RECEIVE YOUR DIVIDENDS AND DISTRIBUTIONS. You can have them all automatically reinvested in fund shares (at NAV), sent to you by check or wired to your bank account of record. Tell us your preference on your application. If you don't indicate a preference, your dividends and distributions will all be reinvested. For retirement plans, reinvestment is the only option.

Distributions are treated the same for federal income tax purposes whether you receive them in cash or reinvest them in additional shares. For federal income tax purposes, an exchange is treated the same as a sale.

Because the fund seeks to maintain a stable share price, you are unlikely to have capital gains or losses when you sell fund shares.

For federal income tax purposes, distributions of investment income are taxable as ordinary income. The fund does not expect to make distributions that are eligible for taxation as long-term capital gains or as qualified dividend income.

The use of a master/feeder structure could affect the amount, timing and character of distributions, and therefore, may increase the amount of taxes payable to shareholders.

Your fund will send you detailed federal income tax information every January. These statements tell you the amount and the federal income tax classification of any dividends or distributions you received. They also have certain details on your purchases and sales of shares.

The above discussion is applicable to shareholders who are US persons. If you are a non-US person, please consult your own tax advisor with respect to the US tax consequences to you of an investment in the fund.

32 | Understanding Distributions and Taxes

APPENDIX

Hypothetical Expense Summary

Using the annual fund operating expense ratios presented in the fee tables in the fund prospectus, the Hypothetical Expense Summary shows the estimated fees and expenses, in actual dollars, that would be charged on a hypothetical investment of $10,000 in the fund held for the next 10 years and the impact of such fees and expenses on fund returns for each year and cumulatively, assuming a 5% return for each year. The tables also assume that all dividends and distributions are reinvested. The annual fund expense ratios shown are net of any contractual fee waivers or expense reimbursements, if any, for the period of the contractual commitment. Also, please note that if you are investing through a third party provider, that provider may have fees and expenses separate from those of the fund that are not reflected here. Mutual fund fees and expenses fluctuate over time and actual expenses may be higher or lower than those shown.

The Hypothetical Expense Summary should not be used or construed as an offer to sell, a solicitation of an offer to buy or a recommendation or endorsement of any specific mutual fund. You should carefully review the fund's prospectus to consider the investment objectives, risks, expenses and charges of the fund prior to investing.

Appendix | 33

DWS Money Market Series - Institutional Shares

 MAXIMUM INITIAL HYPOTHETICAL ASSUMED RATE
 SALES CHARGE: INVESTMENT: OF RETURN:
 0.00% $10,000 5%
 HYPOTHETICAL
 CUMULATIVE ANNUAL CUMULATIVE YEAR-END
 RETURN BEFORE FUND RETURN AFTER BALANCE AFTER ANNUAL FEES
 FEES AND EXPENSE FEES AND FEES AND AND
YEAR EXPENSES RATIOS EXPENSES EXPENSES EXPENSES
 1 5.00% 0.15% 4.85% $ 10,485.00 $ 15.36
 2 10.25% 0.15% 9.94% $ 10,993.52 $ 16.11
 3 15.76% 0.27% 15.14% $ 11,513.52 $ 30.38
 4 21.55% 0.27% 20.58% $ 12,058.11 $ 31.82
 5 27.63% 0.27% 26.28% $ 12,628.45 $ 33.33
 6 34.01% 0.27% 32.26% $ 13,225.78 $ 34.90
 7 40.71% 0.27% 38.51% $ 13,851.36 $ 36.55
 8 47.75% 0.27% 45.07% $ 14,506.53 $ 38.28
 9 55.13% 0.27% 51.93% $ 15,192.69 $ 40.09
 10 62.89% 0.27% 59.11% $ 15,911.30 $ 41.99
 TOTAL $ 318.81

34 | Appendix

TO GET MORE INFORMATION

SHAREHOLDER REPORTS - These include commentary from the fund's management team about recent market conditions and the effects of the fund's strategies on its performance. They also have detailed performance figures, a list of everything the fund owns, and its financial statements. Shareholders get these reports automatically.

STATEMENT OF ADDITIONAL INFORMATION (SAI) - This tells you more about the fund's features and policies, including additional risk information. The SAI is incorporated by reference into this document (meaning that it's legally part of this prospectus).

For a free copy of any of these documents or to request other information about the fund, call (800) 730-1313, or contact DWS Scudder at the address listed below. The fund's SAI and shareholder reports are also available through the DWS Scudder Web site at www.moneyfunds.deam-us.db.com. These documents and other information about the fund are available from the EDGAR Database on the SEC's Internet site at www.sec.gov. If you like, you may obtain copies of this information, after paying a copying fee, by e-mailing a request to publicinfo@sec.gov or by writing the SEC at the address listed below. You can also review and copy these documents and other information about the fund, including the fund's SAI, at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling (800) SEC-0330.

DWS SCUDDER SEC DISTRIBUTOR
---------------------- -------------------- -------------------------------
PO Box 219210 100 F Street, N.E. DWS Scudder Distributors, Inc.
Kansas City, MO Washington, D.C. 222 South Riverside Plaza
64121-9210 20549-0102 Chicago, IL 60606-5808
WWW.MONEYFUNDS.DEAM- WWW.SEC.GOV (800) 621-1148
US.DB.COM (800) SEC-0330
(800) 730-1313

SEC FILE NUMBER:
DWS Money Market Trust DWS Money Market Series 811-03495

(05/01/08) 403-2-106
[RECYCLE GRAPHIC APPEARS HERE]

[Logo]DWS
SCUDDER
Deutsche Bank Group

MAY 1, 2008

PROSPECTUS
MANAGED SHARES

DWS MONEY MARKET SERIES

ONE GLOBAL FORCE. ONE FOCUS. YOU. [DWS SCUDDER Logo]
Deutsche Bank Group

CONTENTS

HOW THE FUND WORKS
 4 The Fund's Main Investment
 Strategy
 6 The Main Risks of Investing in
 the Fund
 9 The Fund's Performance
 History
 10 How Much Investors Pay
 12 Other Policies and Risks
 12 Who Manages and Oversees
 the Fund
 15 Financial Highlights

HOW TO INVEST IN THE FUND
 17 How to Buy, Sell and
 Exchange Shares
 19 Policies You Should Know
 About
 30 Understanding Distributions
 and Taxes
 32 Appendix

HOW THE FUND WORKS

On the next few pages, you'll find information about the fund's investment objective, the main strategies it uses to pursue that objective and the main risks that could affect performance.

Whether you are considering investing in the fund or are already a shareholder, you'll want to LOOK THIS INFORMATION OVER CAREFULLY. You may want to keep it on hand for reference as well.

You can find all Institutional DWS money fund prospectuses on the Internet at WWW.MONEYFUNDS.DEAM-US.DB.COM (the Web site does not form a part of this prospectus).

 Managed Shares
ticker symbol MCAXX
 fund number 2023

 DWS MONEY MARKET SERIES

THE FUND'S MAIN INVESTMENT STRATEGY

The fund maintains a dollar-weighted average maturity of 90 days or less. The fund is managed in accordance with Rule 2a-7 under the Investment Company Act of 1940, as amended.

The fund follows policies designed to maintain a stable share price:

- The fund buys US government debt obligations, money market instruments and other debt obligations that at the time of purchase:

4 | DWS Money Market Series

- are unrated, but are deemed by the Advisor to be of comparable quality to one of the two highest short-term ratings; or

- have no short-term rating, but are rated in one of the top three highest long-term rating categories by a NRSRO or are deemed by the Advisor to be of comparable quality.

Principal investments

The fund invests in the following investments through the Portfolio.

The fund may invest in high quality, short-term, US dollar denominated money market instruments paying a fixed, variable or floating interest rate. These include:

- US government securities that are issued or guaranteed by the US Treasury, or by agencies or instrumentalities of the US government.

- Repurchase agreements, which are agreements to buy securities at one price, with a simultaneous agreement to sell back the securities at a future date at an agreed-upon price.

Under normal market conditions the fund will invest more than 25% of its total assets in the obligations of banks and other financial institutions.

DWS Money Market Series | 5

The fund may invest up to 10% of its total assets in other money market mutual funds in accordance with applicable regulations.

THE MAIN RISKS OF INVESTING IN THE FUND

There are several risk factors that could reduce the yield you get from the fund or cause the fund's performance to trail that of other investments.

The fund is exposed to the risk factors below even though the Portfolio, not the fund, invests directly in the individual securities.

6 | DWS Money Market Series

- it cannot sell the securities at the agreed-upon time and price; or

- the securities lose value before they can be sold.

DWS Money Market Series | 7

8 | DWS Money Market Series

THE FUND'S PERFORMANCE HISTORY

While a fund's past performance isn't necessarily a sign of how it will do in the future, it can be valuable for an investor to know.

Effective July 30, 2007, some of the fund's investment strategies changed. The fund's past performance would have been different if the fund was managed using the current strategies.

DWS Money Market Series

ANNUAL TOTAL RETURN (%) AS OF 12/31 EACH YEAR - Managed Shares
[GRAPHIC APPEARS HERE]

 5.33 5.16 6.33 3.98 1.59 0.97 1.26 3.15 5.00 5.32
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007

2008 TOTAL RETURN AS OF MARCH 31: 0.98%
FOR THE PERIODS INCLUDED IN THE BAR CHART:
BEST QUARTER: 1.64%, Q4 2000 WORST QUARTER: 0.20%, Q3 2003

AVERAGE ANNUAL TOTAL RETURNS (%) as of 12/31/2007

 1 YEAR 5 YEARS 10 YEARS
Managed Shares 5.32 3.12 3.79

Total returns would have been lower if operating expenses hadn't been reduced.

DWS Money Market Series | 9

HOW MUCH INVESTORS PAY

The table below describes the fees and expenses that you may pay if you buy and hold fund shares. This information doesn't include any fees that may be charged by your financial advisor.

 MANAGED
FEE TABLE SHARES
 SHAREHOLDER FEES, paid directly from
 your investment None
______________________________________

 ANNUAL OPERATING EXPENSES, deducted
 from fund assets
______________________________________ _____
 Management Fee1 0.13%
 Distribution/Service (12b-1) Fee None
 Other Expenses2 0.15
 TOTAL ANNUAL OPERATING EXPENSES3 0.28
 Less Fee Waiver/Expense
 Reimbursement4,5 0.08
 NET ANNUAL OPERATING EXPENSES6 0.20

2 "Other Expenses" include an administrative services fee paid to the Advisor in the amount of 0.10% from the fund and 0.03% from the Portfolio.

3 Information on the annual operating expenses reflects the expenses of both the fund and the Master Portfolio, in which the fund invests its assets.

5 Through July 29, 2010, the Advisor has contractually agreed to waive all or a portion of its administrative services fee and reimburse or pay operating expenses of the fund to the extent necessary to maintain the fund's total operating expenses at 0.20% for Managed Shares, excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest expenses.

10 | DWS Money Market Series

Based on the costs above (including one year of capped expenses in the "1 Year" period and two years of capped expenses in the "3 Years," "5 Years," and "10 Years" periods), this example helps you compare the expenses of the fund to those of other mutual funds. This example assumes operating expenses remain the same. It also assumes that you invested $10,000, earned 5% annual returns and reinvested all dividends and distributions and sold your shares at the end of each period. This is only an example; actual expenses will be different.

 1 YEAR 3 YEARS 5 YEARS 10 YEARS
Managed Shares $20 $73 $141 $340

DWS Money Market Series | 11

OTHER POLICIES AND RISKS

While the previous pages describe the main points of the fund's strategy and risks, there are a few other issues to know about:

- Although major changes tend to be infrequent, the fund's Board could change the fund's investment objective without seeking shareholder approval.

For more information

This prospectus doesn't tell you about every policy or risk of investing in the fund.

Keep in mind that there is no assurance that the fund will achieve its objective.

WHO MANAGES AND OVERSEES THE FUND

The investment advisor

12 | Other Policies and Risks

Who Manages and Oversees the Fund | 13

The portfolio managers

A group of investment professionals is responsible for the day-to-day management of the fund. These investment professionals have a broad range of experience managing money market funds.

14 | Who Manages and Oversees the Fund

FINANCIAL HIGHLIGHTS

DWS Money Market Series - Managed Shares

YEARS ENDED DECEMBER 31, 2007a 2007c 2006c 2005c 2004c 2003c
SELECTED PER SHARE DATA
---------------------------------------------------------------------------------------------------- -
NET ASSET VALUE, BEGINNING
OF PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------ ------- ------- ------- ------- -------
 Net investment income .030 .052 .039 .019 .009 .013
______________________________ _______ ________ ________ ________ ________ ________
 Distributions from net
 investment income ( .030) ( .052) ( .039) ( .019) ( .009) ( .013)
------------------------------ ------- -------- -------- -------- -------- --------
NET ASSET VALUE, END OF
PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------- -------- -------- -------- -------- --------
Total Return (%)b 3.06** 5.33 3.98 1.94 .91 1.34
------------------------------ ------- -------- -------- -------- -------- --------

RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA
---------------------------------------------------------------------------------------------------- --------
Net assets, end of period
($ millions) 510 596 454 430 451 588
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses before
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .28* .28 .32 .31 .48 .50
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses after
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .14* .14 .15 .17 .24 .30
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of net investment
income (%) 5.16* 5.22 3.93 1.95 .90 1.29
------------------------------- ------- -------- -------- -------- -------- --------

a For the period from June 1, 2007 through December 31, 2007. The fund changed its fiscal year end from May 31 to December 31.

b Total returns would have been lower had certain expenses not been reduced.

c For the years ended May 31.

d On July 30, 2007, DWS Money Market Series became a feeder of Cash Management Portfolio. Expense ratios disclosed prior to December 31, 2007 are for DWS Money Market Series as a stand-alone fund.

* Annualized

** Non annualized

Financial Highlights | 15

HOW TO INVEST IN THE FUND

You can find out more about the topics covered here by speaking with your FINANCIAL ADVISOR OR A REPRESENTATIVE OF YOUR WORKPLACE RETIREMENT PLAN OR OTHER INVESTMENT PROVIDER.

How to Buy, Sell and Exchange Shares

BUYING SHARES: Use these instructions to invest directly.

FIRST INVESTMENT ADDITIONAL INVESTMENTS
$100,000 or more for all accounts $1,000 or more for regular accounts
 $100 or more for IRAs
 $50 or more with an Automatic
 Investment Plan
BY MAIL OR EXPRESS MAIL (SEE BELOW)
 Send a DWS Scudder investment slip or
- Fill out and sign an application
 short note that includes:
- Send it to us at the appropriate
 - fund, class name and account number
 address, along with an investment
 check - check payable to "DWS Scudder"
BY WIRE
- Call (800) 730-1313 for instructions - Call (800) 730-1313 for instructions
- Instruct the wiring bank to transmit - Instruct the wiring bank to transmit
 the specified amount to: the specified amount to State Street
 State Street Bank and Trust Company Bank and Trust Company with the
 225 Franklin Street information stated to the left
 Boston, MA 02110
 ABA#0110-0002-8
 DDA#9902-810-2
 Attn: Money Market Series-Managed
 Shares #2023
BY PHONE
Not available - Call (800) 730-1313 for instructions
WITH AN AUTOMATIC INVESTMENT PLAN
- Not available - To set up regular investments from a
 bank checking account, call
 (800) 730-1313
USING QuickBuy
Not available - Call (800) 730-1313 to make sure
 QuickBuy is set up on your account; if
 it is, you can request a transfer from
 your bank account of any amount
 between $50 and $250,000
ON THE INTERNET
- Go to - Call (800) 730-1313 to ensure you have
 www.moneyfunds.deam-us.db.com electronic services
- Print out a prospectus and a new - Register at www.moneyfunds.deam-
 account application us.db.com
- Complete and return the application - Follow the instructions for buying
 with your check shares with money from your bank
 account

REGULAR, EXPRESS, REGISTERED OR CERTIFIED MAIL: Deutsche Asset Management Institutional Money Funds; Client Services, 210 West 10th Street, Kansas City, MO 64105-1614
PHONE NUMBER: 1-800-730-1313

How to Buy, Sell and Exchange Shares | 17

EXCHANGING OR SELLING SHARES: Use these instructions to exchange or sell shares in an account opened directly with DWS Scudder.

EXCHANGING INTO ANOTHER FUND SELLING SHARES
To open a new account: same minimum Some transactions, including most for
as for a first investment over $100,000, can only be ordered in
For exchanges between existing writing with a signature guarantee;
accounts: $1,000 or more please see "Signature Guarantee"
BY PHONE OR WIRE
- Call (800) 730-1313 for instructions - Call (800) 730-1313 for instructions
USING THE AUTOMATED INFORMATION LINE
- Call (800) 730-1313 for instructions - Call (800) 730-1313 for instructions
BY MAIL OR EXPRESS MAIL
(see previous page for address)
Your instructions should include: Your instructions should include:
- the fund, class and account number - the fund, class and account number
 you're exchanging out of you're exchanging out of
- the dollar amount or number of shares - the dollar amount or number of shares
 you want to exchange you want to exchange
- the name and class of the fund you - your name(s), signature(s) and
 want to exchange into address, as they appear on your
 account
- your name(s), signature(s) and
 address, as they appear on your - a daytime telephone number
 account
- a daytime telephone number
WITH AN AUTOMATIC EXCHANGE PLAN WITH AN AUTOMATIC WITHDRAWAL PLAN
- To set up regular exchanges from a - To set up regular withdrawals from a
 fund account, call (800) 730-1313 fund account, call (800) 730-1313
USING QuickSell
Not available - Call (800) 730-1313 to make sure
 QuickSell is set up on your account; if
 it is, you can request a transfer to your
 bank account of any amount between
 $50 and $250,000
USING CHECKWRITING
Not available - Call (800) 730-1313 for instructions
ON THE INTERNET
- Register at www.moneyfunds.deam- - Register at www.moneyfunds.deam-
 us.db.com us.db.com
- Follow the instructions for making - Follow the instructions for making
 on-line exchanges on-line redemptions

18 | How to Buy, Sell and Exchange Shares

POLICIES YOU SHOULD KNOW ABOUT

Financial intermediary support payments

Policies You Should Know About | 19

20 | Policies You Should Know About

Policies about transactions

Policies You Should Know About | 21

If we are unable to verify your identity within time frames established by the fund, after a reasonable effort to do so, you will receive written notification.

With certain limited exceptions, only US residents may invest in the fund.

22 | Policies You Should Know About

check that are communicated by telephone (but not by the Automated Information Line) and are received in good order by 5:00 p.m. Eastern time on a business day will be effective on that business day.

Shareholders known to the fund may notify Shareholder Services in advance of their wire transfer purchase by calling Shareholder Services prior to the 5:00 p.m. Eastern time cut-off time and providing the amount of the order. The investor will receive a confirmation number for the trade. If the fund receives the wire transfer before the close of the Federal Funds wire system, the trade will be entitled to that day's dividend. If the fund does not receive the wire transfer by the close of the Federal Funds wire system, the trade may not receive the dividend for that day and, depending upon the circumstances, the trade may receive the dividend for the following business day or may be canceled or rejected and, in any case, the investor may be charged for any losses or fees that result, which may be paid by deductions from their account or otherwise. The fund's Distributor may refuse to allow any investor to trade with the fund in this manner and may require that the wire transfer of purchase proceeds be received before the trade is considered in good order.

Policies You Should Know About | 23

To sell by wire, contact Shareholder Services before 5:00 p.m. Eastern time. After you inform Shareholder Services of the amount of your redemption, you will receive a trade confirmation number. If the fund receives a sell request before 5:00 p.m. Eastern time and the request calls for proceeds to be sent out by wire, the proceeds will normally be wired on the same day. However, the shares sold will not earn that day's dividend.

SUB-MINIMUM BALANCES. The fund may close your account and send you the proceeds if your balance falls below $100,000; we will give you 60 days' notice so you can either increase your balance or close your account (these policies don't apply to most retirement accounts).

THE AUTOMATED INFORMATION LINE IS AVAILABLE 24 HOURS A DAY BY CALLING (800) 730-1313. You can use our automated phone services to get information on DWS funds generally and on accounts held directly at DWS Scudder. You can also use this service to make exchanges and to purchase and sell shares.

QUICKBUY AND QUICKSELL let you set up a link between a DWS fund account and a bank account. Once this link is in place, you can move money between the two with a phone call. You'll need to make sure your bank has Automated Clearing House (ACH) services. Transactions take two to three days to be completed and there is a $50 minimum and a $250,000 maximum. To set up QuickBuy or QuickSell on a new account, see the account application; to add it to an existing account, call (800) 730-1313.

24 | Policies You Should Know About

TELEPHONE AND ELECTRONIC TRANSACTIONS. Generally, you are automatically entitled to telephone and electronic transaction privileges, but you may elect not to have them when you open your account or by contacting Shareholder Services at (800) 730-1313 at a later date.

CHECKWRITING enables you to sell shares of the fund by writing a check. Your investment keeps earning dividends until your check clears. Please note that we will not accept checks for less than $1,000. Please note that you should not write checks for more than $5,000,000. Note as well that we can't honor any check larger than your balance at the time the check is presented to us. It is not a good idea to close out an account using a check because the account balance could change between the time you write the check and the time it is processed. Please keep in mind that if you make a purchase by check and that check has not yet cleared, those funds will not be available for immediate redemption.

THE FUND ACCEPTS AUTOMATED CLEARING HOUSE ("ACH") debit entries for accounts that have elected the checkwriting redemption privilege. Upon receipt of an ACH debit entry referencing your account number you authorize us to redeem shares in your account to pay the entry to the third party originating the debit. Your fund account statement will show all ACH debit entries in your account. IN CASE OF ERRORS OR QUESTIONS ABOUT YOUR TRANSACTIONS OR PRE-AUTHORIZED TRANSFERS please contact your financial advisor as soon as possible if you believe your statement reflects an improper charge or if you need more information about an ACH debit entry transaction. Your financial advisor must contact the Shareholder Service Agent within sixty (60) days of the fund sending you the first fund account statement on which an improper charge appears.

Policies You Should Know About | 25

WHEN YOU ASK US TO SEND OR RECEIVE A WIRE, please note that while we don't charge a fee to send or receive wires, it's possible that your bank may do so. Wire transactions are generally completed within 24 hours. The fund can only send wires of $1,000 or more and accept wires of $50 or more.

26 | Policies You Should Know About

SELLING SHARES OF TRUST ACCOUNTS AND BUSINESS OR ORGANIZATION ACCOUNTS may require additional documentation. Please call (800) 730-1313 or contact your financial advisor for more information.

MONEY FROM SHARES YOU SELL is normally sent out within one business day of the business day that your redemption order is effective. There are circumstances when it could be longer, including, but not limited to, when you are selling shares you bought recently by check or ACH (the funds will be placed under a 10 calendar day hold to ensure good funds) or when unusual circumstances prompt the SEC to allow further delays. Certain expedited redemption processes (e.g., redemption proceeds by wire) may also be delayed or unavailable when you are selling shares recently purchased by check or ACH or in the event of closing of the Federal Reserve wire payment system. The fund reserves the right to suspend or postpone redemptions as permitted pursuant to Section 22(e) of the Investment Company Act of 1940. Generally, those circumstances are when 1) the New York Stock Exchange is closed other than customary weekend or holiday closings; 2) trading on the New York Stock Exchange is restricted; 3) an emergency exists which makes the disposal of securities owned by the fund or the fair determination of the value of the fund's net assets not reasonably practicable; or 4) the SEC, by order, permits the suspension of the right of redemption. Redemption payments by wire may also be delayed in the event of a non-routine closure of the Federal Reserve wire payment system. For additional rights reserved by the fund, please see "Other rights we reserve."

You may obtain additional information about other ways to sell your shares by contacting your financial advisor.

Policies You Should Know About | 27

How the fund calculates share price

To calculate net asset value, or NAV, each share class uses the following equation:

 TOTAL ASSETS - TOTAL LIABILITIES
----------------------------------------- = NAV
 TOTAL NUMBER OF SHARES OUTSTANDING

The price at which you buy and sell shares is based on the NAV per share next calculated after the order is received by the transfer agent.

28 | Policies You Should Know About

permitted.) If redemption proceeds are requested by ACH or check, the transmission of the ACH payment or the mailing of the check, as the case may be, will be delayed by at least one business day in comparison to normal trading periods. Orders submitted by other means will be processed on the next day that the Exchange is open. The calculation of share price will be as set forth in the prospectus for normal trading days. Orders must be submitted by the cut-off times for receipt of wire purchases entitled to that day's dividend and for receipt of telephone redemption orders for same day wire transfer, which will be the earlier of: (a) the times set forth in the prospectus for normal trading days or (b) such earlier times that the fund determines based on the criteria described above. If redemption proceeds are requested by ACH or check, orders must be received prior to the calculation of share price. Please call (877) 237-1131 or visit our Web site at www.moneyfunds.deam-us.db.com for additional information about whether the fund will be open for business on a particular day. Information concerning the intention of the fund to be open for a Limited Trading Period will be available at least one business day prior to the applicable day that the Exchange is closed or is closing early in the case of scheduled closings and as soon as practical in the case of unscheduled closings.

Other rights we reserve

You should be aware that we may do any of the following:

- withdraw or suspend the offering of shares at any time

- reject a new account application if you don't provide any required or requested identifying information, or for any other reason

Policies You Should Know About | 29

- change, add or withdraw various services, fees and account policies (for example, we may adjust the fund's investment minimums at any time)

UNDERSTANDING DISTRIBUTIONS AND TAXES

THE FUND INTENDS TO DECLARE DIVIDENDS DAILY AND PAY THEM MONTHLY. The fund may take into account capital gains and losses (other than net long-term capital gains) in its daily dividend declarations. The fund may make additional distributions for tax purposes, if necessary.

THE FOLLOWING SIDEBAR TEXT APPEARS NEXT TO THE PRECEDING PARAGRAPHS

Because each shareholder's tax situation is unique, ask your tax professional about the tax consequences of your investments, including any state and local tax consequences.

30 | Understanding Distributions and Taxes

Because the fund seeks to maintain a stable share price, you are unlikely to have capital gains or losses when you sell fund shares.

The use of a master/feeder structure could affect the amount, timing and character of distributions, and therefore, may increase the amount of taxes payable to shareholders.

Understanding Distributions and Taxes | 31

APPENDIX
--------------------------------------------------------------------------------
 Hypothetical Expense Summary

32 | Appendix

DWS Money Market Series - Managed Shares

 MAXIMUM INITIAL HYPOTHETICAL ASSUMED RATE
 SALES CHARGE: INVESTMENT: OF RETURN:
 0.00% $10,000 5%
 HYPOTHETICAL
 CUMULATIVE ANNUAL CUMULATIVE YEAR-END
 RETURN BEFORE FUND RETURN AFTER BALANCE AFTER ANNUAL FEES
 FEES AND EXPENSE FEES AND FEES AND AND
YEAR EXPENSES RATIOS EXPENSES EXPENSES EXPENSES
 1 5.00% 0.20% 4.80% $ 10,480.00 $ 20.48
 2 10.25% 0.20% 9.83% $ 10,983.04 $ 21.46
 3 15.76% 0.28% 15.01% $ 11,501.44 $ 31.48
 4 21.55% 0.28% 20.44% $ 12,044.31 $ 32.96
 5 27.63% 0.28% 26.13% $ 12,612.80 $ 34.52
 6 34.01% 0.28% 32.08% $ 13,208.12 $ 36.15
 7 40.71% 0.28% 38.32% $ 13,831.55 $ 37.86
 8 47.75% 0.28% 44.84% $ 14,484.40 $ 39.64
 9 55.13% 0.28% 51.68% $ 15,168.06 $ 41.51
 10 62.89% 0.28% 58.84% $ 15,883.99 $ 43.47
 TOTAL $ 339.53

Appendix | 33

TO GET MORE INFORMATION

DWS SCUDDER SEC DISTRIBUTOR
---------------------- -------------------- -------------------------------
PO Box 219210 100 F Street, N.E. DWS Scudder Distributors, Inc.
Kansas City, MO Washington, D.C. 222 South Riverside Plaza
64121-9210 20549-0102 Chicago, IL 60606-5808
WWW.MONEYFUNDS.DEAM- WWW.SEC.GOV (800) 621-1148
US.DB.COM (800) SEC-0330
(800) 730-1313

SEC FILE NUMBER:
DWS Money Market Trust DWS Money Market Series 811-03495

(05/01/08) 23-2-106

[RECYCLE GRAPHIC APPEARS HERE]
[Logo]DWS
SCUDDER
Deutsche Bank Group

MAY 1, 2008

PROSPECTUS
PREMIUM CLASS S SHARES
PRIME RESERVE CLASS S SHARES

DWS MONEY MARKET SERIES

ONE GLOBAL FORCE. ONE FOCUS. YOU. [DWS SCUDDER Logo]
Deutsche Bank Group

CONTENTS

HOW THE FUND WORKS
 4 The Fund's Main Investment
 Strategy
 6 The Main Risks of Investing in
 the Fund
 9 The Fund's Performance
 History
 10 How Much Investors Pay
 12 Other Policies and Risks
 12 Who Manages and Oversees
 the Fund
 15 Financial Highlights

HOW TO INVEST IN THE FUND
 18 How to Buy, Sell and
 Exchange Shares
 20 Policies You Should Know
 About
 31 Understanding Distributions
 and Taxes
 33 Appendix

HOW THE FUND WORKS

On the next few pages, you'll find information about the fund's investment objective, the main strategies it uses to pursue that objective and the main risks that could affect performance.

Whether you are considering investing in the fund or are already a shareholder, you'll want to LOOK THIS INFORMATION OVER CAREFULLY. You may want to keep it on hand for reference as well.

CLASS S shares are generally only available to new investors through fee-based programs of investment dealers that have special agreements with the fund's distributor, through certain group retirement plans and through certain registered investment advisors. These dealers and advisors typically charge ongoing fees for services they provide.

The fund is a money fund, meaning that is seeks to maintain a stable $1.00 share price to preserve the value of your investment.

You can find DWS prospectuses on the Internet at WWW.DWS-SCUDDER.COM (the Web site does not form a part of this prospectus).

 Premium Prime Reserve
 Class S Class S
ticker symbol SPMXX SCRXX
 fund number 2402 2309

 DWS MONEY MARKET SERIES

THE FUND'S MAIN INVESTMENT STRATEGY

The fund maintains a dollar-weighted average maturity of 90 days or less. The fund is managed in accordance with Rule 2a-7 under the Investment Company Act of 1940, as amended.

The fund follows policies designed to maintain a stable share price:

- The fund buys US government debt obligations, money market instruments and other debt obligations that at the time of purchase:

4 | DWS Money Market Series

- are unrated, but are deemed by the Advisor to be of comparable quality to one of the two highest short-term ratings; or

- have no short-term rating, but are rated in one of the top three highest long-term rating categories by a NRSRO or are deemed by the Advisor to be of comparable quality.

Principal investments

The fund invests in the following investments through the Portfolio.

The fund may invest in high quality, short-term, US dollar denominated money market instruments paying a fixed, variable or floating interest rate. These include:

- US government securities that are issued or guaranteed by the US Treasury, or by agencies or instrumentalities of the US government.

- Repurchase agreements, which are agreements to buy securities at one price, with a simultaneous agreement to sell back the securities at a future date at an agreed-upon price.

DWS Money Market Series | 5

Under normal market conditions the fund will invest more than 25% of its total assets in the obligations of banks and other financial institutions.

The fund may invest up to 10% of its total assets in other money market mutual funds in accordance with applicable regulations.

THE MAIN RISKS OF INVESTING IN THE FUND

There are several risk factors that could reduce the yield you get from the fund or cause the fund's performance to trail that of other investments.

The fund is exposed to the risk factors below even though the Portfolio, not the fund, invests directly in the individual securities.

6 | DWS Money Market Series

that provides credit enhancement for it. To minimize credit risk, the fund only buys high quality securities. Also, the fund only buys securities with remaining maturities of 397 days (approximately 13 months) or less. This reduces the risk that the issuer's creditworthiness will change, or that the issuer will default on the principal and interest payments of the obligation. Additionally, some securities issued by US government agencies or instrumentalities are supported only by the credit of that agency or instrumentality. There is no guarantee that the US government will provide support to such agencies or instrumentalities and such securities may involve risk of loss of principal and interest. Securities that rely on third party guarantors to raise their credit quality could fall in price or go into default if the financial condition of the guarantor deteriorates.

- it cannot sell the securities at the agreed-upon time and price; or

- the securities lose value before they can be sold.

DWS Money Market Series | 7

8 | DWS Money Market Series

THE FUND'S PERFORMANCE HISTORY

While a fund's past performance isn't necessarily a sign of how it will do in the future, it can be valuable for an investor to know.

The inception date for Premium Class S is August 4, 1997 and for Prime Reserve Class S the inception date is October 15, 1998. Performance figures before these dates for each share class reflect the historical performance of the fund's original share class, DWS Money Market Series - Managed Shares and, in the case of the Prime Reserve Class S shares, are adjusted to reflect the higher gross total annual operating expenses of each class. Managed Shares are offered in a different prospectus.

Effective July 30, 2007, some of the fund's investment strategies changed. The fund's past performance would have been different if the fund was managed using the current strategies.

DWS Money Market Series

ANNUAL TOTAL RETURN (%) AS OF 12/31 EACH YEAR - Premium Class S
[GRAPHIC APPEARS HERE]

 5.46 5.20 6.40 3.93 1.54 0.89 1.19 3.18 5.01 5.30
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007

 2008 TOTAL RETURN AS OF MARCH 31: 0.97%
FOR THE PERIODS INCLUDED IN THE BAR CHART:
BEST QUARTER: 1.63%, Q3 2000 WORST QUARTER: 0.19%, Q3 2003

AVERAGE ANNUAL TOTAL RETURNS (%) as of 12/31/2007

 1 YEAR 5 YEARS 10 YEARS
Premium Class S 5.30 3.10 3.79
Prime Reserve Class S 5.21 2.97 3.61

Total returns would have been lower if operating expenses hadn't been reduced.

DWS Money Market Series | 9

HOW MUCH INVESTORS PAY

The table below describes the fees and expenses that you may pay if you buy and hold fund shares. This information doesn't include any fees that may be charged by your financial advisor.

 PREMIUM PRIME RESERVE
FEE TABLE CLASS S CLASS S
 SHAREHOLDER FEES, paid directly from
 your investment None None
______________________________________

 ANNUAL OPERATING EXPENSES, deducted
 from fund assets
______________________________________ _____ _____
 Management Fee1 0.13% 0.13%
 Distribution/Service (12b-1) Fee None None
 Other Expenses2 0.17 0.25
 TOTAL ANNUAL OPERATING EXPENSES3 0.30 0.38
 Less Fee Waiver/Expense
 Reimbursement4,5 0.02 0.01
 NET ANNUAL OPERATING EXPENSES6 0.28 0.37

2 "Other Expenses" include an administrative services fee paid to the Advisor in the amount of 0.10% from the fund and 0.03% from the Portfolio.

3 Information on the annual operating expenses reflects the expenses of both the fund and the Master Portfolio, in which the fund invests its assets.

5 Through July 29, 2010, the Advisor has contractually agreed to waive all or a portion of its administrative services fee and reimburse or pay operating expenses of the fund to the extent necessary to maintain the fund's total operating expenses at 0.28% for Premium Class S shares and 0.37% for Prime Reserve Class S shares, excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest expenses.

10 | DWS Money Market Series

 1 YEAR 3 YEARS 5 YEARS 10 YEARS
Premium Class S
shares $29 $ 92 $165 $377
Prime Reserve
Class S shares 38 120 211 478

DWS Money Market Series | 11

OTHER POLICIES AND RISKS

While the previous pages describe the main points of the fund's strategy and risks, there are a few other issues to know about:

- Although major changes tend to be infrequent, the fund's Board could change the fund's investment objective without seeking shareholder approval.

For more information

This prospectus doesn't tell you about every policy or risk of investing in the fund.

Keep in mind that there is no assurance that the fund will achieve its objective.

A complete list of the fund's portfolio holdings is posted as of each month end on or after the 14th day of the following month on www.dws-scudder.com (the Web site does not form a part of this prospectus). This posted information generally remains accessible at least until the date on which the fund files its Form N-CSR or N-Q with the Securities and Exchange Commission for the period that includes the date as of which the posted information is current. The fund may also post on the Web site, on a more frequent basis, a percentage breakdown of the holdings of the fund by type of security. The fund's Statement of Additional Information includes a description of the fund's policies and procedures with respect to the disclosure of the fund's portfolio holdings.

WHO MANAGES AND OVERSEES THE FUND

The investment advisor

12 | Other Policies and Risks

Who Manages and Oversees the Fund | 13

The portfolio managers

A group of investment professionals is responsible for the day-to-day management of the fund. These investment professionals have a broad range of experience managing money market funds.

14 | Who Manages and Oversees the Fund

FINANCIAL HIGHLIGHTS

DWS Money Market Series - Premium Class S

YEARS ENDED DECEMBER 31, 2007a 2007c 2006c 2005c 2004c 2003c
SELECTED PER SHARE DATA
---------------------------------------------------------------------------------------------------- -
NET ASSET VALUE, BEGINNING
OF PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------ ------- ------- ------- ------- -------
 Net investment income .030 .052 .039 .019 .008 .013
______________________________ _______ ________ ________ ________ ________ ________
 Distributions from net
 investment income ( .030) ( .052) ( .039) ( .019) ( .008) ( .013)
------------------------------ ------- -------- -------- -------- -------- --------
NET ASSET VALUE, END OF
PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------- -------- -------- -------- -------- --------
Total Return (%)b 3.06** 5.33 3.98 1.94 .81 1.29
------------------------------ ------- -------- -------- -------- -------- --------

RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA
---------------------------------------------------------------------------------------------------- --------
Net assets, end of period
($ millions) 691 715 510 499 512 653
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses before
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .29* .28 .31 .30 .49 .50
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses after
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .15* .14 .15 .16 .33 .35
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of net investment
income (%) 5.15* 5.22 3.92 1.96 .81 1.24
------------------------------- ------- -------- -------- -------- -------- --------

a For the period from June 1, 2007 through December 31, 2007. The fund changed its fiscal year end from May 31 to December 31.

b Total returns would have been lower had certain expenses not been reduced.

c For the years ended May 31.

d On July 30, 2007, DWS Money Market Series became a feeder of Cash Management Portfolio. Expense ratios disclosed prior to December 31, 2007 are for DWS Money Market Series as a stand-alone fund.

* Annualized

** Not annualized

Financial Highlights | 15

DWS Money Market Series - Prime Reserve Class S

YEARS ENDED DECEMBER 31, 2007a 2007c 2006c 2005c 2004c 2003c
SELECTED PER SHARE DATA
---------------------------------------------------------------------------------------------------- -
NET ASSET VALUE, BEGINNING
OF PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------ ------- ------- ------- ------- -------
 Net investment income .030 .051 .038 .018 .007 .011
______________________________ _______ ________ ________ ________ ________ ________
 Distributions from net
 investment income ( .030) ( .051) ( .038) ( .018) ( .007) ( .011)
------------------------------ ------- -------- -------- -------- -------- --------
NET ASSET VALUE, END OF
PERIOD $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00
------------------------------ ------- -------- -------- -------- -------- --------
Total Return (%)b 3.01** 5.23 3.86 1.78 .66 1.14
------------------------------ ------- -------- -------- -------- -------- --------

RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA
---------------------------------------------------------------------------------------------------- --------
Net assets, end of period
($ millions) 112 111 41 48 38 48
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses before
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .37* .37 .43 .46 .64 .65
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of expenses after
expense reductions including
expenses allocated from Cash
Management Portfolio (%)d .23* .23 .27 .32 .49 .50
_______________________________ _______ ________ ________ ________ ________ ________
Ratio of net investment
income (%) 5.07* 5.13 3.77 1.80 .65 1.09
------------------------------- ------- -------- -------- -------- -------- --------

a For the period from June 1, 2007 through December 31, 2007. The fund changed its fiscal year end from May 31 to December 31.

b Total returns would have been lower had certain expenses not been reduced.

c For the years ended May 31.

d On July 30, 2007, DWS Money Market Series became a feeder of Cash Management Portfolio. Expense ratios disclosed prior to December 31, 2007 are for DWS Money Market Series as a stand-alone fund.

* Annualized

** Not annualized

16 | Financial Highlights

HOW TO INVEST IN THE FUND

Please remember, CLASS S shares are generally only available to new investors through fee-based programs of investment dealers that have special agreements with the fund's distributor, through certain group retirement plans and through certain registered investment advisors. These dealers and advisors typically charge ongoing fees for services they provide.

You can find out more about the topics covered here by speaking with your FINANCIAL ADVISOR OR A REPRESENTATIVE OF YOUR WORKPLACE RETIREMENT PLAN OR OTHER INVESTMENT PROVIDER.

How to Buy, Sell and Exchange Shares

BUYING SHARES: Use these instructions to invest directly. Make out your check to "DWS Scudder."

FIRST INVESTMENT ADDITIONAL INVESTMENTS
$10,000 or more for Prime Reserve $50 or more for regular accounts and
Class S; IRA accounts
$25,000 or more for Premium Class S $50 or more with an Automatic
 Investment Plan
BY MAIL OR EXPRESS MAIL (SEE BELOW)
 Send a DWS Scudder investment slip or
- Fill out and sign an application
 short note that includes:
- Send it to us at the appropriate
 - fund and class name
 address, along with an investment
 check - account number
 - check payable to "DWS Scudder"
BY WIRE
- Call (800) 728-3337 for instructions - Call (800) 728-3337 for instructions
BY PHONE
Not available - Call (800) 728-3337 for instructions
WITH AN AUTOMATIC INVESTMENT PLAN
- Fill in the information on your - To set up regular investments from a
 application and include a voided check bank checking account, call
 (800) 728-3337
USING QuickBuy
Not available - Call (800) 728-3337 to make sure
 QuickBuy is set up on your account; if
 it is, you can request a transfer from
 your bank account of any amount
 between $50 and $250,000
ON THE INTERNET
- Go to www.dws-scudder.com - Call (800) 728-3337 to ensure you have
 electronic services
- Print out a prospectus and a new
 account application - Register at www.dws-scudder.com
- Complete and return the application - Follow the instructions for buying
 with your check shares with money from your bank
 account

REGULAR MAIL:

First Investment: DWS Scudder, PO Box 219356, Kansas City, MO 64121-9356 Additional Investments: DWS Scudder, PO Box 219154, Kansas City, MO 64121-9154

EXPRESS, REGISTERED OR CERTIFIED MAIL:
DWS Scudder, 210 West 10th Street, Kansas City, MO 64105-1614

18 | How to Buy, Sell and Exchange Shares

EXCHANGING OR SELLING SHARES: Use these instructions to exchange or sell shares in an account opened directly with DWS Scudder.

EXCHANGING INTO ANOTHER FUND SELLING SHARES
To open a new account: same minimum Some transactions, including most for
as for a first investment over $100,000, can only be ordered in
For exchanges between existing writing with a signature guarantee;
accounts: $50 or more please see "Signature Guarantee"
BY PHONE OR WIRE
- Call (800) 728-3337 for instructions - Call (800) 728-3337 for instructions
USING THE AUTOMATED INFORMATION LINE
- Call (800) 728-3337 for instructions - Call (800) 728-3337 for instructions
BY MAIL OR EXPRESS MAIL
(see previous page for address)
Your instructions should include: Your instructions should include:
- the fund, class and account number - the fund, class and account number
 you're exchanging out of you're exchanging out of
- the dollar amount or number of shares - the dollar amount or number of shares
 you want to exchange you want to exchange
- the name and class of the fund you - your name(s), signature(s) and
 want to exchange into address, as they appear on your
 account
- your name(s), signature(s) and
 address, as they appear on your - a daytime telephone number
 account
- a daytime telephone number
WITH AN AUTOMATIC EXCHANGE PLAN WITH AN AUTOMATIC WITHDRAWAL PLAN
- To set up regular exchanges from a - To set up regular withdrawals from a
 fund account, call (800) 728-3337 fund account, call (800) 728-3337
USING QuickSell
Not available - Call (800) 728-3337 to make sure
 QuickSell is set up on your account; if
 it is, you can request a transfer to your
 bank account of any amount between
 $50 and $250,000
USING CHECKWRITING
Not available - Write a check on your account. See
 "Checkwriting" under "Policies about
 transactions" for checkwriting
 minimums
ON THE INTERNET
- Register at www.dws-scudder.com - Register at www.dws-scudder.com
- Follow the instructions for making - Follow the instructions for making
 on-line exchanges on-line redemptions

How to Buy, Sell and Exchange Shares | 19

POLICIES YOU SHOULD KNOW ABOUT

Financial intermediary support payments

20 | Policies You Should Know About

Policies You Should Know About | 21

Policies about transactions

22 | Policies You Should Know About

If we are unable to verify your identity within time frames established by the fund, after a reasonable effort to do so, you will receive written notification.

With certain limited exceptions, only US residents may invest in the fund.

Policies You Should Know About | 23

check that are communicated by telephone (but not by the Automated Information Line) and are received in good order by 5:00 p.m. Eastern time on a business day will be effective on that business day.

24 | Policies You Should Know About

conditions. Requests for same day wire that are received earlier in the day will be given priority over requests received later in the day in the event that it is necessary to limit the amount of same day wire redemptions.

SUB-MINIMUM BALANCES. The fund may close your account and send you the proceeds if your balance falls below the minimum for your share class, which is $7,500 for Prime Reserve Class S and $20,000 for Premium Class S; in either case, we will give you 60 days' notice (90 days for retirement accounts) so you can either increase your balance or close your account (these policies don't apply to investors with $100,000 or more in DWS fund shares).

Because of the high cost of servicing accounts with low balances, an account maintenance fee of $6.25 per quarter (for a $25 annual fee) will be assessed on accounts whose balances fail to meet the minimum initial investment requirement for a period of 90 days prior to the assessment date. The quarterly assessment will occur on or about the 15th of the last month in each calendar quarter. Please note that the fee will be assessed on accounts that fall below the minimum for any reason, including due to market value fluctuations, redemptions or exchanges. The account maintenance fee will apply to all shareholders of the DWS Funds except for: accounts with an automatic investment plan, accounts held in an omnibus account through a financial services firm, accounts maintained on behalf of participants in certain fee based and wrap programs offered through certain financial intermediaries approved by the Advisor and participant level accounts in group retirement plans held on the records of a retirement plan record keeper.

THE AUTOMATED INFORMATION LINE IS AVAILABLE 24 HOURS A DAY BY CALLING (800) 728-3337. You can use our automated phone services to get information on DWS funds generally and on accounts held directly at DWS Scudder. You can also use this service to make exchanges and to purchase and sell shares.

Policies You Should Know About | 25

(ACH) services. Transactions take two to three days to be completed and there is a $50 minimum and a $250,000 maximum. To set up QuickBuy or QuickSell on a new account, see the account application; to add it to an existing account, call (800) 728-3337.

TELEPHONE AND ELECTRONIC TRANSACTIONS. Generally, you are automatically entitled to telephone and electronic transaction privileges, but you may elect not to have them when you open your account or by contacting Shareholder Services at (800) 728-3337 at a later date.

CHECKWRITING enables you to sell shares of the fund by writing a check. Your investment keeps earning dividends until your check clears. Please note that we will not accept checks for less than $100. Please note that you should not write checks for more than $5,000,000. Note as well that we can't honor any check larger than your balance at the time the check is presented to us. It is not a good idea to close out an account using a check because the account balance could change between the time you write the check and the time it is processed. Please keep in mind that if you make a purchase by check and that check has not yet cleared, those funds will not be available for immediate redemption.

26 | Policies You Should Know About

financial advisor as soon as possible if you believe your statement reflects an improper charge or if you need more information about an ACH debit entry transaction. Your financial advisor must contact the Shareholder Service Agent within sixty (60) days of the fund sending you the first fund account statement on which an improper charge appears.

Policies You Should Know About | 27

SELLING SHARES OF TRUST ACCOUNTS AND BUSINESS OR ORGANIZATION ACCOUNTS may require additional documentation. Please call (800) 728-3337 or contact your financial advisor for more information.

You may obtain additional information about other ways to sell your shares by contacting your financial advisor.

28 | Policies You Should Know About

the fund has not approved any policies and procedures designed to limit this activity. However, the fund reserves the right to and may reject or cancel a purchase or exchange order into the fund for any reason, including if, in the opinion of the Advisor, there appears to be a pattern of short-term or excessive trading by an investor in another DWS fund.

How the fund calculates share price

To calculate net asset value, or NAV, each share class uses the following equation:

 TOTAL ASSETS - TOTAL LIABILITIES
----------------------------------------- = NAV
 TOTAL NUMBER OF SHARES OUTSTANDING

The price at which you buy and sell shares is based on the NAV per share next calculated after the order is received by the transfer agent.

Policies You Should Know About | 29

for the fund's portfolio instruments are open and (c) the Advisor believes there will be adequate liquidity in the short-term markets. During any such Limited Trading Period, the fund will only accept purchase orders by wire and telephone redemption orders with proceeds to be sent by wire, ACH or check and will not accept orders by any other means. (Automated Telephone Line orders are not permitted.) If redemption proceeds are requested by ACH or check, the transmission of the ACH payment or the mailing of the check, as the case may be, will be delayed by at least one business day in comparison to normal trading periods. Orders submitted by other means will be processed on the next day that the Exchange is open. The calculation of share price will be as set forth in the prospectus for normal trading days. Orders must be submitted by the cut-off times for receipt of wire purchases entitled to that day's dividend and for receipt of telephone redemption orders for same day wire transfer, which will be the earlier of: (a) the times set forth in the prospectus for normal trading days or (b) such earlier times that the fund determines based on the criteria described above. If redemption proceeds are requested by ACH or check, orders must be received prior to the calculation of share price. Please call (877) 237-1131 or visit our Web site at www.dws-scudder.com for additional information about whether the fund will be open for business on a particular day. Information concerning the intention of the fund to be open for a Limited Trading Period will be available at least one business day prior to the applicable day that the Exchange is closed or is closing early in the case of scheduled closings and as soon as practical in the case of unscheduled closings.

Other rights we reserve

You should be aware that we may do any of the following:

- withdraw or suspend the offering of shares at any time

- reject a new account application if you don't provide any required or requested identifying information, or for any other reason

30 | Policies You Should Know About

- change, add or withdraw various services, fees and account policies (for example, we may adjust the fund's investment minimums at any time)

UNDERSTANDING DISTRIBUTIONS AND TAXES

THE FOLLOWING SIDEBAR TEXT APPEARS NEXT TO THE PRECEDING PARAGRAPHS

Because each shareholder's tax situation is unique, ask your tax professional about the tax consequences of your investments, including any state and local tax consequences.

Understanding Distributions and Taxes | 31

Because the fund seeks to maintain a stable share price, you are unlikely to have capital gains or losses when you sell fund shares.

The use of a master/feeder structure could affect the amount, timing and character of distributions, and therefore, may increase the amount of taxes payable to shareholders.

32 | Understanding Distributions and Taxes

APPENDIX

Hypothetical Expense Summary

Appendix | 33

DWS Money Market Series - Premium Class S

 MAXIMUM INITIAL HYPOTHETICAL ASSUMED RATE
 SALES CHARGE: INVESTMENT: OF RETURN:
 0.00% $10,000 5%
 HYPOTHETICAL
 CUMULATIVE ANNUAL CUMULATIVE YEAR-END
 RETURN BEFORE FUND RETURN AFTER BALANCE AFTER ANNUAL FEES
 FEES AND EXPENSE FEES AND FEES AND AND
YEAR EXPENSES RATIOS EXPENSES EXPENSES EXPENSES
 1 5.00% 0.28% 4.72% $ 10,472.00 $ 28.66
 2 10.25% 0.28% 9.66% $ 10,966.28 $ 30.01
 3 15.76% 0.30% 14.82% $ 11,481.69 $ 33.67
 4 21.55% 0.30% 20.21% $ 12,021.33 $ 35.25
 5 27.63% 0.30% 25.86% $ 12,586.34 $ 36.91
 6 34.01% 0.30% 31.78% $ 13,177.89 $ 38.65
 7 40.71% 0.30% 37.97% $ 13,797.25 $ 40.46
 8 47.75% 0.30% 44.46% $ 14,445.73 $ 42.36
 9 55.13% 0.30% 51.25% $ 15,124.67 $ 44.36
 10 62.89% 0.30% 58.36% $ 15,835.53 $ 46.44
 TOTAL $ 376.77

DWS Money Market Series - Prime Reserve Class S

 MAXIMUM INITIAL HYPOTHETICAL ASSUMED RATE
 SALES CHARGE: INVESTMENT: OF RETURN:
 0.00% $10,000 5%
 HYPOTHETICAL
 CUMULATIVE ANNUAL CUMULATIVE YEAR-END
 RETURN BEFORE FUND RETURN AFTER BALANCE AFTER ANNUAL
 FEES AND EXPENSE FEES AND FEES AND FEES AND
YEAR EXPENSES RATIOS EXPENSES EXPENSES EXPENSES
 1 5.00% 0.37% 4.63% $ 10,463.00 $ 37.86
 2 10.25% 0.37% 9.47% $ 10,947.44 $ 39.61
 3 15.76% 0.38% 14.53% $ 11,453.21 $ 42.56
 4 21.55% 0.38% 19.82% $ 11,982.35 $ 44.53
 5 27.63% 0.38% 25.36% $ 12,535.93 $ 46.58
 6 34.01% 0.38% 31.15% $ 13,115.09 $ 48.74
 7 40.71% 0.38% 37.21% $ 13,721.01 $ 50.99
 8 47.75% 0.38% 43.55% $ 14,354.92 $ 53.34
 9 55.13% 0.38% 50.18% $ 15,018.12 $ 55.81
 10 62.89% 0.38% 57.12% $ 15,711.95 $ 58.39
 TOTAL $ 478.41

34 | Appendix

TO GET MORE INFORMATION

For a free copy of any of these documents or to request other information about the fund, call (800) 728-3337, or contact DWS Scudder at the address listed below. The fund's SAI and shareholder reports are also available through the DWS Scudder Web site at www.dws-scudder.com. These documents and other information about the fund are available from the EDGAR Database on the SEC's Internet site at www.sec.gov. If you like, you may obtain copies of this information, after paying a copying fee, by e-mailing a request to publicinfo@sec.gov or by writing the SEC at the address listed below. You can also review and copy these documents and other information about the fund, including the fund's SAI, at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling (800) SEC-0330.

DWS SCUDDER SEC DISTRIBUTOR
--------------------- -------------------- -------------------------------
PO Box 219151 100 F Street, N.E. DWS Scudder Distributors, Inc.
Kansas City, MO Washington, D.C. 222 South Riverside Plaza
64121-9151 20549-0102 Chicago, IL 60606-5808
WWW.DWS-SCUDDER.COM WWW.SEC.GOV (800) 621-1148
(800) 728-3337 (800) SEC-0330

SEC FILE NUMBER:
DWS Money Market Trust DWS Money Market Series 811-03495

(05/01/08) 309/402-2
[RECYCLE GRAPHIC APPEARS HERE]

[Logo]DWS
SCUDDER
Deutsche Bank Group

DWS MONEY MARKET TRUST

DWS Money Market Series

Prime Reserve Class S

Premium Class S

Institutional Shares

Managed Shares

STATEMENT OF ADDITIONAL INFORMATION

May 1, 2008

This Statement of Additional Information is not a prospectus and should be read in conjunction with the prospectuses for the Fund, dated May 1, 2008, as amended from time to time, for DWS Money Market Series (the "Fund"), a series of DWS Money Market Trust (the "Trust"), copies of which may be obtained without charge by contacting DWS Scudder Distributors, Inc., 222 South Riverside Plaza, Chicago, Illinois 60606, (800) 621-1148 or from the firm from which this Statement of Additional Information was obtained. It is also available along with other related materials on the Securities and Exchange Commission's Internet Web site (http://www.sec.gov).

Effective, July 30, 2007, the Fund became a feeder fund in a master/feeder fund arrangement. The Fund pursues its investment objective by investing substantially all of its assets in a master portfolio -- the Cash Management Portfolio (the "Portfolio"), which has the same investment objective and is subject to the same investment risks as the Fund. References to actions undertaken by the Fund may refer to actions undertaken by the Portfolio.

Portions of the Annual Report to Shareholders of the Fund, dated December 31, 2007, are incorporated by reference, as specified herein. A copy of the Fund's Annual Reports may be obtained without charge by calling the Fund at the toll-free number (800) 728-3337 for Prime Reserve Class S and Premium Class S and (800) 730-1313 for Institutional Shares and Managed Shares.

This Statement of Additional Information is incorporated by reference into the prospectuses.

TABLE OF CONTENTS

 Page
 ----

INVESTMENT RESTRICTIONS.......................................................1

INVESTMENT POLICIES AND TECHNIQUES............................................2
 Investment Techniques......................................................2
 Portfolio Holdings .......................................................10

MANAGEMENT OF THE FUND.......................................................11
 Investment Advisor........................................................11

SERVICE PROVIDERS............................................................19
 Administrator.............................................................19
 Distributor...............................................................20
 Custodian.................................................................21
 Transfer Agent and Shareholder Service Agent..............................21
 Legal Counsel.............................................................23
 Independent Registered Public Accounting Firm.............................23

PORTFOLIO TRANSACTIONS.......................................................25

PURCHASE AND REDEMPTION OF SHARES............................................29

DIVIDENDS....................................................................49

TAXES........................................................................50

NET ASSET VALUE..............................................................55

TRUSTEES AND OFFICERS........................................................56

TRUST ORGANIZATION...........................................................74

PROXY VOTING GUIDELINES......................................................76

FINANCIAL STATEMENTS.........................................................78

ADDITIONAL INFORMATION.......................................................78

APPENDIX.....................................................................79

INVESTMENT RESTRICTIONS

Unless specified to the contrary, the following fundamental policies may not be changed without the approval of a majority of the outstanding voting securities of the Fund which, under the Investment Company Act of 1940, as amended (the "1940 Act"), and the rules thereunder and as used in this Statement of Additional Information, means the lesser of (1) 67% or more of the voting securities present at a meeting, if the holders of more than 50% of the outstanding voting securities of the Fund are present or represented by proxy, or (2) more than 50% of the outstanding voting securities of the Fund.

Any investment restrictions herein which involve a maximum percentage of securities or assets shall not be considered to be violated unless an excess over the percentage occurs immediately after and is caused by an acquisition or encumbrance of securities or assets of, or borrowings by, the Fund or Portfolio.

As a matter of fundamental policy, the Fund and the Portfolio may not:

(1) borrow money, except as permitted under the 1940 Act, and as interpreted or modified by regulatory authority having jurisdiction, from time to time;
(2) issue senior securities, except as permitted under the 1940 Act, and as interpreted or modified by regulatory authority having jurisdiction, from time to time;
(3) engage in the business of underwriting securities issued by others, except to the extent that the Fund may be deemed to be an underwriter in connection with the disposition of portfolio securities;
(4) purchase or sell real estate, which term does not include securities of companies which deal in real estate or mortgages or investments secured by real estate or interests therein, except that the Fund reserves freedom of action to hold and to sell real estate acquired as a result of the Fund's ownership of securities;
(5) purchase or sell commodities, except as permitted by the 1940 Act, and as interpreted or modified by the regulatory authority have jurisdiction, from time to time;

(6) make loans except as permitted under the 1940 Act, and as interpreted or modified by regulatory authority having jurisdiction, from time to time; or

(7) concentrate its investments in any particular industry (excluding US Government Obligations), as that term is used in the 1940 Act, and as interpreted or modified by the regulatory authority having jurisdiction from time to time; except that the Fund will invest more than 25% of its total assets in the obligations of banks and other financial institutions.

In addition, as a matter of non-fundamental policy, the Fund and the Portfolio currently do not intend to:

(1) borrow money in an amount greater than 5% of its total assets, except for temporary or emergency purposes;
(2) lend portfolio securities in an amount greater than 5% of its total assets; or
(3) acquire securities of registered open-end investment companies or registered unit investment trusts in reliance on Sections 12(d)(1)(F) or 12(d)(1)(G) of the 1940 Act.

Non-fundamental policies may be changed by the Trustees of the Trust or Portfolio without requiring approval of or, with certain exceptions, prior notice to shareholders.

There will be no violation of any investment restrictions or policies (except with respect to fundamental investment restriction (1) above) if that restriction is complied with at the time the relevant action is taken, notwithstanding a later change in the market value of an investment, in net or total assets, or in the change of securities rating of the investment, or any other later change.

INVESTMENT POLICIES AND TECHNIQUES

Investment Techniques

The Fund is a diversified investment portfolio of the Trust, a professionally managed open-end, management investment company. The Fund seeks a high level of current income consistent with liquidity and the preservation of capital. The Fund invests substantially all of its assets in the Portfolio with the same goal as the Fund. The Fund, through the Portfolio, seeks to achieve its goal by investing in high quality, short-term money market instruments and maintains a dollar-weighted average maturity of 90 days or less. The Fund may withdraw its investments from the Portfolio at any time if the Trustees of the Trust determine that it is in the best interests of the Fund to do so.

Since the investment characteristics of the Fund will correspond directly to those of the Portfolio in which the Fund invests all of its assets, the following is a discussion of the various investments of and techniques employed by the Portfolio.

Quality and Maturity of the Portfolio's Securities. The Portfolio will maintain a dollar-weighted average maturity of 90 days or less. All securities in which the Portfolio invests will have, or be deemed to have, remaining maturities of 397 days or less on the date of their purchase and will be denominated in US dollars. The Advisor, acting under the supervision of and procedures adopted by the Board of Trustees of the Portfolio, will also determine that all securities purchased by the Portfolio present minimal credit risks. The Advisor will cause the Portfolio to dispose of any security as soon as practicable if the security is no longer of the requisite quality, unless such action would not be in the best interest of the Portfolio. High-quality, short-term instruments may result in a lower yield than instruments with a lower quality or longer term.

Obligations of Banks and Other Financial Institutions. The Portfolio may invest in US dollar-denominated high quality fixed rate or variable rate obligations of US or foreign financial institutions, including banks, which have received one of the two highest short-term ratings from two nationally recognized statistical rating organizations ("NRSROs") (or one NRSRO if that NRSRO is the only NRSRO that rates such obligations) or, are unrated, but are deemed by the Advisor to be of comparable quality to one of the two highest short-term ratings; or, have no short-term rating, but are rated in one of the top three highest long-term rating categories by a NRSRO or are deemed by the Advisor to be of comparable quality. Obligations of domestic and foreign financial institutions in which the Portfolio may invest include (but are not limited to) certificates of deposit, bankers' acceptances, bank time deposits, commercial paper, and other US dollar-denominated instruments issued or supported by the credit of US or foreign financial institutions, including banks.

For purposes of the Portfolio's investment policies with respect to bank obligations, the assets of a bank will be deemed to include the assets of its domestic and foreign branches. Obligations of foreign branches of US banks and foreign banks may be general obligations of the parent bank in addition to the issuing bank or may be limited by the terms of a specific obligation and by government regulation. If the Advisor deems the instruments to present minimal credit risk, the Portfolio may invest in obligations of foreign banks or foreign branches of US banks, which may include banks located in the United Kingdom, Grand Cayman Island, Nassau, Japan, Canada and Australia.

Investments in these obligations may entail risks that are different from those of investments in obligations of US domestic banks because of differences in political, regulatory and economic systems and conditions. These risks include future political and economic developments, currency blockage, the possible imposition of withholding taxes on interest payments, possible seizure or nationalization of foreign deposits, difficulty or inability of pursuing legal remedies and obtaining judgments in foreign courts, possible establishment of exchange controls or the adoption of other foreign governmental restrictions that might affect adversely the payment of principal and interest on bank obligations. Foreign branches of US banks and foreign banks may also be subject to less stringent reserve requirements and to different accounting, auditing, reporting and record keeping standards than those applicable to domestic branches of US banks.

Under normal market conditions, the Portfolio will invest a significant portion of its assets in the bank and other financial institution obligations. The Portfolio's concentration of its investments in the obligations of banks and other financial institutions will cause the Portfolio to be subject to the risks peculiar to these industries to a greater extent than if its investments were not so concentrated.

Commercial Paper. The Portfolio may invest in fixed rate or variable rate commercial paper, issued by US or foreign entities. Commercial paper consists of short-term (usually up to one year) unsecured promissory notes issued by US or foreign entities in order to finance their current operations.

Commercial paper when purchased by the Portfolio must be rated in the highest short-term rating category by any two NRSROs (or one NRSRO if that NRSRO is the only such NRSRO which rates such security) or, is unrated, but is deemed by the Advisor to be of comparable quality to one of the two highest short-term ratings; or, has no short-term rating, but is rated in one of the top three highest long-term rating categories by a NRSRO or is deemed by the Advisor to be of comparable quality. Investing in foreign commercial paper generally involves risks similar to those described above relating to obligations of foreign banks or foreign branches and subsidiaries of US and foreign banks. Any commercial paper issued by a foreign entity and purchased by the Portfolio must be US dollar-denominated and must not be subject to foreign withholding tax at the time of purchase.

For a description of commercial paper ratings, see the Appendix to this SAI.

Variable Rate Master Demand Notes. Variable rate master demand notes are unsecured instruments that permit the indebtedness there under to vary and provide for periodic adjustments in the interest rate. Because variable rate master demand notes are direct lending arrangements between the Portfolio and the issuer, they are not ordinarily traded. Although no active secondary market may exist for these notes, the Portfolio will purchase only those notes under which it may demand and receive payment of principal and accrued interest daily or may resell the note at any time to a third party. While the notes are not typically rated by credit rating agencies, issuers of variable rate master demand notes must satisfy the Advisor, acting under the supervision of the Board of Trustees of the Portfolio, that the same criteria as set forth above for issuers of commercial paper are met. In the event an issuer of a variable rate master demand note defaulted on its payment obligation, the Portfolio might be unable to dispose of the note because of the absence of an active secondary market and could, for this or other reasons, suffer a loss to the extent of the default. The face maturities of variable rate notes subject to a demand feature may exceed 397 days in certain circumstances. (See "Quality and Maturity of the Portfolio's Securities" herein.)

US Government Obligations. The Portfolio may invest in obligations issued or guaranteed by the US government which include: (1) direct obligations of the US Treasury and (2) obligations issued by US government agencies and instrumentalities ("US Government Obligations"). Included among direct obligations of the US are Treasury Bills, Treasury Notes and Treasury Bonds, which differ in terms of their interest rates, maturities and dates of issuance. Treasury Bills have maturities of less than one year, Treasury Notes have maturities of one to 10 years and Treasury Bonds generally have maturities of greater than 10 years at the date of issuance. Included among the obligations issued by agencies and instrumentalities of the US are: instruments that are supported by the full faith and credit of the US (such as certificates issued by the Government National Mortgage Association ("GNMA" or "Ginnie Mae"); instruments that are supported by the right of the issuer to borrow from the US Treasury (such as securities of Federal Home Loan Banks); and instruments that are supported by the credit of the instrumentality (such as Federal National Mortgage Association ("FNMA" or "Fannie Mae") and Federal Home Loan Mortgage Corporation ("FHLMC" or "Freddie Mac").

Other US government securities the Portfolio may invest in include (but are not limited to) securities issued or guaranteed by the Federal Housing Administration, Farmers Home Loan Administration, Export-Import Bank of the US, Small Business Administration, General Services Administration, Central Bank for Cooperatives, Federal Farm Credit Banks, Federal Intermediate Credit Banks, Federal Land Banks, Maritime Administration, Tennessee Valley Authority, District of Columbia Armory Board and Student Loan Marketing Association. Because the US government is not obligated by law to provide support to an instrumentality it sponsors, the Portfolio will invest in obligations issued by such an instrumentality only if the Advisor determines that the credit risk with respect to the instrumentality does not make its securities unsuitable for investment by the Portfolio.

The Portfolio may also invest in separately traded principal and interest component of securities guaranteed or issued by the US government or its agencies, instrumentalities or sponsored enterprises if such components trade independently under the Separate Trading of Registered Interest and Principal of Securities program ("STRIPS") or any similar program sponsored by the US government. STRIPS are sold as zero coupon securities.

Other Debt Obligations. The Portfolio may invest in deposits, bonds, notes and debentures and other debt obligations that at the time of purchase meet the Portfolio's minimum credit quality standards, or, if unrated, have been determined by the Advisor to be of comparable quality or, if the obligations have no short-term rating, are rated in one of the top three highest long-term rating categories or have been determined by the Advisor to be of comparable quality.

Asset-Backed Securities. The Portfolio may invest in securities generally referred to as asset-backed securities. Asset-backed securities are secured by and payable from, or directly or indirectly represent undivided fractional interests in, assets such as pools of consumer loans, trade receivables or other types of loans held in a trust. Such assets are securitized through the use of trusts and special purpose corporations. Asset-backed securities may provide periodic payments that consist of interest and/or principal payments. Consequently, the life of an asset-backed security varies with the prepayment and loss experience of the underlying assets. Payments of principal and interest are typically supported by some form of credit enhancement, such as a letter of credit, surety bond, limited guarantee or senior/subordination. The degree of credit enhancement varies, but generally amounts to only a fraction of the asset-backed security's par value until exhausted. If the credit enhancement is exhausted, certificate-holders may experience losses or delays in payment if the required payments of principal and interest are not made to the trust with respect to the underlying loans. The value of the securities also may change because of changes in the market's perception of creditworthiness of the servicing agent for the loan pool, the originator of the loans or the financial institution providing the credit enhancement. Asset-backed securities are ultimately dependent upon payment of loans and receivables by individuals, businesses and other borrowers, and the certificate-holder generally has no recourse against the entity that originated the loans.

The underlying assets of asset-backed securities include assets such as (but not limited to) first lien mortgages, motor vehicle installment sale contracts, other installment sale contracts, home equity loans, leases of various types of real and personal property, receivables from revolving credit (credit card) agreements and trade receivables. Payments or distributions of principal and interest on asset-backed securities may be guaranteed up to certain amounts and for a certain time period by a letter of credit or a pool insurance policy issued by a financial institution unaffiliated with the issuer, or other credit enhancements may be present.

Asset-backed securities present certain risks. Primarily, these securities do not have the benefit of a security interest in the related collateral. Credit card receivables are generally unsecured, and the debtors are entitled to the protection of a number of state and federal consumer credit laws, many of which give such debtors the right to avoid payment of certain amounts owed on the credit cards, thereby reducing the balance due. Most issuers of automobile receivables permit the servicer to retain possession of the underlying obligations. If the servicer were to sell these obligations to another party, there is a risk that the purchaser would acquire an interest superior to that of the holders of the related automobile receivables. In addition, because of the large number of vehicles involved in a typical issuance and technical requirements under state laws, the trustee for the holders of the automobile receivables may not have a proper security interest in all of the obligations backing such receivables. Therefore, there is the possibility that recoveries on repossessed collateral may not, in some cases, be available to support payments on these securities.

The asset-backed securities in which the Portfolio may invest are limited to those which satisfy the requirements contained in Rule 2a-7 under the Investment Company Act of 1940 (the "1940 Act").

The yield characteristics of the asset-backed securities in which the Portfolio may invest differ from those of traditional debt securities. Among the major differences are that interest and principal payments are made more frequently on asset-backed securities (usually monthly) and that principal may be prepaid at any time because the underlying assets generally may be prepaid at any time. As a result, if the Portfolio purchases these securities at a premium, a prepayment rate that is faster than expected will reduce their yield, while a prepayment rate that is slower than expected will have the opposite effect of increasing yield. Conversely, if the Portfolio purchases these securities at a discount, faster than expected prepayments will increase, while slower than expected prepayments will reduce, the yield on these securities. Amounts available for reinvestment by the Portfolio are likely to be greater during a period of declining interest rates and, as a result, are likely to be reinvested at lower interest rates than during a period of rising interest rates.

Repurchase Agreements. The Portfolio may engage in repurchase agreement transactions with members of the Federal Reserve System, certain non-US banks and certain non-bank entities. Under the terms of a typical repurchase agreement, the Portfolio would acquire any underlying security for a relatively short period (usually not more than one week), subject to an obligation of the seller to repurchase, and the Portfolio to resell, the obligation at an agreed price and time, thereby determining the yield during the Portfolio's holding period. This arrangement results in a fixed rate of return that is not subject to market fluctuations during the Portfolio's holding period. The value of the underlying securities will be at least equal at all times to the total amount of the repurchase obligation, including interest. The Portfolio bears a risk of loss in the event of default by or bankruptcy of the other party to a repurchase agreement. The Portfolio may be delayed in, or prevented from, exercising its rights to dispose of the collateralized securities. To the extent that, in the meantime, the value of the underlying securities had decreased or the value of the collateralized securities had increased, the Portfolio could experience a loss. The Advisor reviews the creditworthiness of those banks and dealers with which the Portfolio enters into repurchase agreements and monitors on an ongoing basis the value of the securities subject to repurchase agreements to ensure that it is maintained at the required level. A repurchase agreement is considered to be a loan under the 1940 Act.

Reverse Repurchase Agreements. The Portfolio may borrow funds by, among other things, agreeing to sell portfolio securities to financial institutions that meet the standards described under "Repurchase Agreements" and to repurchase them at a mutually agreed date and price (a "reverse repurchase agreement"). The Portfolio may enter into reverse repurchase agreements with banks and domestic broker-dealers. At the time the Portfolio enters into a reverse repurchase agreement it will identify on its books cash or liquid securities having a value equal to the repurchase price, including accrued interest. The marked assets will be marked-to-market daily and additional assets will be marked on any day in which the assets fall below the repurchase price (plus accrued interest). The Portfolio's liquidity and ability to manage its assets might be affected when it sets aside cash or portfolio securities to cover such commitments. Reverse repurchase agreements involve the risk that the market value of the securities sold by the Portfolio may decline below the repurchase price of those securities. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, such buyer or its trustee or receiver may receive an extension of time to determine whether to enforce the Portfolio's obligation to repurchase the securities, and the Portfolio's use of the proceeds of the reverse repurchase agreement may effectively be restricted pending such decision. Reverse repurchase agreements are considered to be borrowings by the Portfolio under the 1940 Act.

When-Issued and Delayed-Delivery Securities. The Portfolio may purchase securities on a when-issued or delayed-delivery basis. Delivery of and payment for these securities can take place a month or more after the date of the purchase commitment. The payment obligation and the interest rate that will be received on when-issued and delayed-delivery securities are fixed at the time the buyer enters into the commitment. Due to fluctuations in the value of securities purchased or sold on a when-issued or delayed-delivery basis, the yields obtained on such securities may be higher or lower than the yields available in the market on the dates when the investments are actually delivered to the buyers. When-issued securities may include securities purchased on a "when, as and if issued" basis, under which the issuance of the security depends on the occurrence of a subsequent event, such as approval of a merger, corporate reorganization or debt restructuring. The value of such securities is subject to market fluctuation during this period and no interest or income, as applicable, accrues to the Portfolio until settlement takes place.

At the time the Portfolio make the commitment to purchase securities on a when-issued or delayed delivery basis, it will record the transaction, reflect the value each day of such securities in determining its net asset value and, if applicable, calculate the maturity for the purposes of average maturity from that date. At the time of settlement a when-issued security may be valued at less than the purchase price. To facilitate such acquisitions, the Portfolio identifies on its books cash or liquid assets in an amount at least equal to such commitments. It may be expected that the Portfolio's net assets will fluctuate to a greater degree when it sets aside portfolio securities to cover such purchase commitments than when it sets aside cash. On delivery dates for such transactions, the Portfolio will meet its obligations from maturities or sales of the segregated securities and/or from cash flow. If the Portfolio chooses to dispose of the right to acquire a when-issued security prior to its acquisition, it could, as with the disposition of any other portfolio obligation, incur a gain or loss due to market fluctuation. When the Portfolio engages in when-issued or delayed-delivery transactions, it relies on the other party to consummate the trade. Failure of the seller to do so may result in the Portfolio's incurring a loss or missing an opportunity to obtain a price considered to be advantageous.

Investment in Other Investment Companies. In accordance with applicable law, the Portfolio may invest its assets in other money market funds with comparable investment objectives. In general, the Portfolio may not (1) purchase more than 3% of any other money market fund's voting stock; (2) invest more than 5% of its assets in any single money market fund; and (3) invest more than 10% of its assets in other money market funds unless permitted to exceed these limitations by an exemptive order of the Securities and Exchange Commission (the "SEC"). As a shareholder of another money market fund, the Portfolio would bear, along with other shareholders, their pro rata portion of the other money market fund's expenses, including advisory fees. These expenses would be in addition to the advisory and other expenses that the Portfolio bears directly (and the Fund bears indirectly on a pro rata basis) in connection with its own operations.

Credit Enhancement. Certain of the Portfolio's acceptable investments may be credit-enhanced by a guaranty, letter of credit, or insurance from a third party. Any bankruptcy, receivership, default, or change in the credit quality of the third party providing the credit enhancement may adversely affect the quality and marketability of the underlying security and could cause losses to the Portfolio and affect the Portfolio's share price. Subject to the diversification limits contained in Rule 2a-7 under the 1940 Act, the Portfolio may have more than 25% of its total assets invested in securities issued by or credit-enhanced by banks or other financial institutions.

Lending of Portfolio Securities. The Portfolio has the authority to lend up to 30% of the total value of its portfolio securities (taken at market value). The Portfolio may lend its investment securities to approved institutional borrowers, including those who need to borrow securities in order to complete certain transactions, such as covering short sales, avoiding failures to deliver securities or completing arbitrage operations. By lending its investment securities, the Portfolio attempts to increase its net investment income through the receipt of interest on the loan. Any gain or loss in the market price of the securities loaned that might occur during the term of the loan would belong to the Portfolio. The Portfolio may lend its investment securities so long as the terms, structure and the aggregate amount of such loans are not inconsistent with the 1940 Act or the rules and regulations or interpretations of the SEC there under, which currently require that (a) the borrower pledge and maintain with the Portfolio collateral consisting of liquid, unencumbered assets having a value at all times not less than 100% of the value of the securities loaned, (b) the borrower add to such collateral whenever the price of the securities loaned rises (i.e., the borrower "marks to the market" on a daily basis), (c) the loan be made subject to termination by the Portfolio at any time, and (d) the Portfolio receives reasonable interest on the loan (which may include the Portfolio investing any cash collateral in interest bearing short-term investments), and distributions on the loaned securities and any increase in their market value. There may be risks of delay in recovery of the securities or even loss of rights in the collateral should the borrower of the securities fail financially. However, loans will be made only to borrowers selected by the Portfolio's delegate after a commercially reasonable review of relevant facts and circumstances, including the creditworthiness of the borrower. Payments received by a Portfolio in lieu of any dividends paid on the loaned securities will not be treated as "qualified dividend income" for purposes of determining what portion of a Fund's dividends received by individuals may be taxed at the rates generally applicable to ling-term capital gains. See "Taxes."

At the present time, the staff of the SEC does not object if an investment company pays reasonable negotiated fees in connection with loaned securities, so long as such fees are set forth in a written contract and approved by the investment company's Board of Trustees. In addition, voting rights may pass with the loaned securities, but if a material event occurs affecting an investment on loan, the loan must be called and the securities voted. Pursuant to an exemptive order granted by the SEC, cash collateral received by the Portfolio may be invested in a money market fund managed by the Advisor (or one of its affiliates).

Illiquid Securities. Historically, illiquid securities have included securities subject to contractual or legal restrictions on resale because they have not been registered under the Securities Act of 1933, as amended (the "1933 Act"), securities which are otherwise not readily marketable and repurchase agreements having a maturity of longer than seven days. Securities which have not been registered under the 1933 Act are referred to as private placements or restricted securities and are purchased directly from the issuer or in the secondary market. Investments in non-publicly traded securities (including Rule 144A Securities, as defined below) may involve a high degree of business and financial risk and may result in substantial losses. These securities may be less liquid than publicly traded securities, and it may take longer to liquidate these positions than would be the case for publicly traded securities. Companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements applicable to companies whose securities are publicly traded. Limitations on resale may have an adverse effect on the marketability of portfolio securities and a mutual fund might be unable to dispose of restricted or other illiquid securities promptly or at reasonable prices and might thereby experience difficulty satisfying redemptions within seven days. An investment in illiquid securities is subject to the risk that, should the Portfolio desire to sell any of these securities when a ready buyer is not available at a price that is deemed to be representative of their value, the value of the Portfolio's net assets could be adversely affected.

Mutual funds do not typically hold a significant amount of these restricted or other illiquid securities because of the potential for delays on resale and uncertainty in valuation. A mutual fund might also have to register such restricted securities in order to dispose of them resulting in additional expense and delay. Adverse market conditions could impede such a public offering of securities.

A large institutional market has developed for certain securities that are not registered under the 1933 Act, including repurchase agreements, commercial paper, non-US securities, municipal securities and corporate bonds and notes. Institutional investors depend on an efficient institutional market in which the unregistered security can be readily resold or on an issuer's ability to honor a demand for repayment. The fact that there are contractual or legal restrictions on resale of such investments to the general public or to certain institutions may not be indicative of their liquidity.

The SEC has adopted Rule 144A, which allows a broader institutional trading market for securities otherwise subject to restriction on their resale to the general public. Rule 144A establishes a "safe harbor" from the registration requirements of the 1933 Act for resales of certain securities to qualified institutional buyers ("Rule 144A Securities"). The Advisor anticipates that the market for certain restricted securities such as institutional commercial paper will expand further as a result of this regulation and the development of automated systems for the trading, clearance and settlement of unregistered securities of domestic and non-US issuers, such as the PORTAL System sponsored by the Financial Industry Regulatory Authority ("FINRA").

An investment in Rule 144A Securities will be considered illiquid and therefore subject to the Portfolio's limit on the purchase of illiquid securities unless the Advisor determines that the Rule 144A Securities are liquid. In reaching liquidity decisions, the Advisor may consider, inter alia, the following factors: (i) the unregistered nature of the security; (ii) the frequency of trades and quotes for the security; (iii) the number of dealers wishing to purchase or sell the security and the number of other potential purchasers; (iv) dealer undertakings to make a market in the security and (v) the nature of the security and the nature of the marketplace trades (e.g., the time needed to dispose of the security, the method of soliciting offers and the mechanics of the transfer).

Investing in Rule 144A Securities could have the effect of increasing the level of illiquidity in the Portfolio to the extent that qualified institutional buyers are unavailable or uninterested in purchasing such securities from the Portfolio. The Board has adopted guidelines and delegated to the Advisor the daily function of determining and monitoring the liquidity of Rule 144A Securities, although the Board will retain ultimate responsibility for any liquidity determinations.

Impact of Sub-Prime Mortgage Market. The Fund may invest in mortgage-backed, asset-backed and other fixed-income securities whose value and liquidity may be adversely affected by the critical downturn in the sub-prime mortgage lending market in the US. Sub-prime loans, which, have higher interest rates, are made to borrowers with low credit ratings or other factors that increase the risk of default. Concerns about widespread defaults on sub-prime loans have also created heightened volatility and turmoil in the general credit markets. As a result, the Fund's investments in certain fixed-income securities may decline in value, their market value may be more difficult to determine, and the Fund may have more difficulty disposing of them.

Impact of Large Redemptions and Purchases of Fund Shares. From time to time, shareholders of the Fund (which may include affiliated and/or non-affiliated registered investment companies that invest in the Fund) may make relatively large redemptions or purchases of Fund shares. These transactions may cause the Fund to have to sell securities or invest additional cash, as the case may be. While it is impossible to predict the overall impact of these transactions over time, there could be adverse effects on the Fund's performance to the extent that the Fund may be required to sell securities or invest cash at times when it would not otherwise do so. These transactions could also accelerate the realization of taxable income if sales of securities resulted in capital gains or other income and could also increase transaction costs, which may impact the Fund's expense ratio.

Additional Risk Factors

In addition to the risks discussed above, the Portfolio's investments may be subject to the following risk factors:

Special Information Concerning Master-Feeder Fund Structure. Unlike other open-end management investment companies (mutual funds) which directly acquire and manage their own portfolio securities, the Fund seeks to achieve its investment objective by investing substantially all of its assets in the Portfolio, a separate registered investment company with the same investment objective as the Fund. Therefore, an investor's interest in the Portfolio's securities is indirect. In addition to selling a beneficial interest to the Fund, the Portfolio may sell beneficial interests to other mutual funds, investment vehicles or institutional investors. Such investors will invest in the Portfolio on the same terms and conditions and will pay a proportionate share of the Portfolio's expenses. However, the other investors investing in the Portfolio are not required to sell their shares at the same public offering price as the Fund due to variations in sales commissions and other operating expenses. Therefore, investors in the Fund should be aware that these differences may result in differences in returns experienced by investors in the different funds that invest in the Portfolio. Such differences in returns are also present in other mutual fund structures. Information concerning other holders of interests in the Portfolio is available from the Advisor at (800) 730-1313, with respect to Institutional Shares and Managed Shares, and at (800) 728-3337, with respect to Prime Reserve Class S Shares and Premium Class S Shares.

Smaller funds investing in the Portfolio may be materially affected by the actions of larger funds investing in the Portfolio. For example, if a large fund withdraws from the Portfolio, the remaining funds may experience higher pro rata operating expenses, thereby producing lower returns (however, this possibility exists as well for traditionally structured funds which have large institutional investors). Also, the Portfolio may be required to sell investments at a price or time not advantageous to the Portfolio in order to meet such a redemption. Additionally, the Portfolio may become less diverse, resulting in increased portfolio risk. Also, funds with a greater pro rata ownership in the Portfolio could have effective voting control of the operations of the Portfolio. Except as permitted by the SEC, whenever the Fund is requested to vote on matters pertaining to the Portfolio, the Fund will hold a meeting of shareholders of the Fund and will cast all of its votes in the same proportion as the votes of the Fund's shareholders.

Certain changes in the Portfolio's investment objectives, policies or restrictions may require the Fund to withdraw its interest in the Portfolio. Any such withdrawal could result in a distribution "in kind" of portfolio securities (as opposed to a cash distribution from the Portfolio). If securities are distributed, the Fund could incur brokerage, tax or other charges in converting the securities to cash. In addition, the distribution in kind may result in a less diversified portfolio of investments or adversely affect the liquidity of the Fund. Notwithstanding the above, there are other means for meeting redemption requests, such as borrowing.

The Fund may withdraw its investment from the Portfolio at any time, if the Board of Trustees of DWS Money Market Trust (the "Trust") determines that it is in the best interests of the shareholders of the Fund to do so. Upon any such withdrawal, the Board of Trustees would consider what action might be taken, including the investment of all the assets of the Fund in another pooled investment entity having the same investment objective as the Fund or the retaining of an investment advisor to manage the Fund's assets in accordance with the investment policies described herein with respect to the Portfolio.

Rating Services. The ratings of Moody's Investor Service ("Moody's"), the Standard & Poor's Division of The McGraw-Hill Companies ("S&P") and Fitch Ratings ("Fitch") represent their opinions as to the quality of the securities that they undertake to rate. It should be emphasized, however, that ratings are relative and subjective and are not absolute standards of quality. Although these ratings are an initial criterion for selection of portfolio investments, the Advisor also makes its own evaluation of these securities, subject to review by the Board of Trustees. After purchase by the Portfolio, an obligation may cease to be rated or its rating may be reduced below the minimum required for purchase by the Portfolio. The Advisor will cause the Portfolio to dispose of any security as soon as practicable if the security is no longer of the requisite quality, unless such action would not be in the best interest of the Portfolio. A description of the ratings used herein and in the Prospectus is set forth in the Appendix to this SAI.

Portfolio Holdings

In addition to the public disclosure of Fund portfolio holdings through required Securities and Exchange Commission ("SEC") quarterly filings, the Fund may make its portfolio holdings information publicly available on the DWS Funds' Web site as described in the Fund's prospectus. The Fund does not disseminate non-public information about portfolio holdings except in accordance with policies and procedures adopted by the Fund.

The Fund's procedures permit non-public portfolio holdings information to be shared with Deutsche Asset Management and its affiliates (collectively "DeAM"), subadvisors, if any, custodians, independent registered public accounting firms, attorneys, officers and trustees/directors and each of their respective affiliates and advisers who require access to this information to fulfill their duties to the Fund and are subject to the duties of confidentiality, including the duty not to trade on non-public information, imposed by law or contract, or by the Fund's procedures. This non-public information may also be disclosed, subject to the requirements described below, to securities lending agents, financial printers, proxy voting firms, mutual fund analysts and rating and tracking agencies, or to shareholders in connection with in-kind redemptions (collectively, "Authorized Third Parties").

Prior to any disclosure of the Fund's non-public portfolio holdings information to Authorized Third Parties, a person authorized by the Fund's Trustees must make a good faith determination in light of the facts then known that the Fund has a legitimate business purpose for providing the information, that the disclosure is in the best interest of the Fund, and that the recipient assents or otherwise has a duty to keep the information confidential and to not trade based on the information received while the information remains non-public. No compensation is received by the Fund or DeAM for disclosing non-public holdings information. Periodic reports regarding these procedures will be provided to the Fund's Trustees.

Portfolio holdings information distributed by the trading desks of DeAM or a subadvisor for the purpose of facilitating efficient trading of such securities and receipt of relevant research is not subject to the foregoing requirements. Non-public portfolio holding information does not include portfolio characteristics (other than holdings or subsets of holdings) about the Fund and information derived therefrom, including, but not limited to, how the Fund's investments are divided among various sectors, industries, countries, value and growth stocks, bonds, currencies and cash, types of bonds, bond maturities, duration, bond coupons and bond credit quality ratings so long as the Fund's holdings could not be derived from such information.

Registered investment companies that are subadvised by DeAM may be subject to different portfolio holdings disclosure policies, and neither DeAM nor the Fund's Trustees exercise control over such policies. In addition, separate account clients of DeAM have access to their portfolio holdings and are not subject to the Fund's portfolio holdings disclosure policy. The portfolio holdings of some of the funds subadvised by DeAM and some of the separate accounts managed by DeAM may substantially overlap with the portfolio holdings of the Fund.

DeAM also manages certain unregistered commingled trusts and creates model portfolios, the portfolio holdings of which may substantially overlap with the portfolio holdings of the Fund. To the extent that investors in these commingled trusts or recipients of model portfolio holdings information may receive portfolio holdings information of their trust or of a model portfolio on a different basis from that on which fund portfolio holdings information is made public, DeAM has implemented procedures reasonably designed to encourage such investors and recipients to keep such information confidential, and to prevent those investors from trading on the basis of non-public holdings information.

There is no assurance that the Fund's policies and procedures with respect to the disclosure of portfolio holdings information will protect the Fund from the potential misuse of portfolio holdings information by those in possession of that information.

MANAGEMENT OF THE FUND

Investment Advisor

Deutsche Investment Management Americas Inc. ("DIMA" or the "Advisor"), which is part of Deutsche Asset Management, is the investment advisor for the Fund and the Portfolio. The Fund seeks to achieve its investment objective by investing substantially all its assets into the Portfolio. Under the supervision of the Board of Trustees, DIMA, with headquarters at 345 Park Avenue, New York, New York 10154, makes the Portfolio's investment decisions, buys and sells securities for the Portfolio and conducts research that leads to these purchase and sale decisions. The Advisor manages the Portfolio's daily investment and business affairs subject to the policies established by the Board. DIMA and its predecessors have more than 80 years of experience managing mutual funds. DIMA provides a full range of investment advisory services to institutional and retail clients. The Portfolio's investment advisor is also responsible for selecting brokers and dealers and for negotiating brokerage commissions and dealer charges.

DeAM is the marketing name in the US for the asset management activities of Deutsche Bank AG, DIMA, Deutsche Asset Management, Inc., Deutsche Bank Trust Company Americas and DWS Trust Company. DeAM is a global asset management organization that offers a wide range of investing expertise and resources, including hundreds of portfolio managers and analysts and an office network that reaches the world's major investment centers. This well resourced global investment platform brings together a wide variety of experience and investment insight, across industries, regions, asset classes and investing styles. DIMA is an indirect, wholly owned subsidiary of Deutsche Bank AG. Deutsche Bank AG is a major global banking institution that is engaged in a wide range of financial services, including investment management, mutual fund, retail, private and commercial banking, investment banking and insurance. The term "DWS Scudder" is the designation given to the products and services provided by DIMA and its affiliates to the DWS Mutual Funds.

Pursuant to each investment management agreement with the Fund and the Portfolio, the Advisor acts as investment advisor, manages its investments, administers its business affairs, furnishes office facilities and equipment, provides clerical and administrative services and permits its officers and employees to serve without compensation as trustees or officers of the Fund and Portfolio if elected to such positions. DIMA provides investment counsel for many individuals and institutions, including insurance companies, industrial corporations, and financial and banking organizations, as well as providing investment advice to open- and closed-end SEC registered funds. In certain cases, the investments for the Portfolio, and in some cases the Fund, are managed by the same individuals who manage one or more other mutual funds advised by the Advisor that have similar names, objectives and investment styles. You should be aware that the Portfolio, and the Fund, if applicable, are likely to differ from these other mutual funds in size, cash flow pattern and tax matters. Accordingly, the holdings and performance of the Portfolio and the Fund can be expected to vary from those of these other mutual funds.

Certain investments may be appropriate for the Portfolio or the Fund and also for other clients advised by the Advisor. Investment decisions for the Portfolio or the Fund and other clients are made with a view to achieving their respective investment objectives and after consideration of such factors as their current holdings, availability of cash for investment and the size of their investments generally. Frequently, a particular security may be bought or sold for only one client or in different amounts and at different times for more than one but less than all clients. Likewise, a particular security may be bought for one or more clients when one or more other clients are selling the security. In addition, purchases or sales of the same security may be made for two or more clients on the same day. In such event, such transactions will be allocated among the clients in a manner believed by the Advisor to be equitable to each. In some cases, this procedure could have an adverse effect on the price or amount of the securities purchased or sold by the Portfolio or the Fund. Purchase and sale orders for the Portfolio, or the Fund as appropriate, may be combined with those of other clients of the Advisor in the interest of achieving the most favorable net results to the Fund.

The Board and the shareholders of the Portfolio and the Fund, respectively, approved an amended and restated investment management agreement (the "Investment Management Agreements" and each an "Investment Management Agreement"). Pursuant to the Investment Management Agreements, the Advisor provides continuing investment management of the assets of the Fund and the Portfolio. In addition to the investment management of the assets of the Fund and the Portfolio, the Advisor determines the investments to be made for the Fund and the Portfolio, including what portion of its assets remain uninvested in cash or cash equivalents, and with whom the orders for investments are placed, consistent with the policies set forth in its Prospectus and SAI, or as adopted by the Board. The Advisor will also monitor, to the extent not monitored by the administrator or other agent of the Fund or Portfolio, the compliance with its investment and tax guidelines and other compliance policies.

The Advisor provides assistance to the Board in valuing the securities and other instruments held by the Portfolio or Fund, as appropriate, to the extent reasonably required by valuation policies and procedures that may be adopted by the Portfolio or Fund.

Pursuant to the Investment Management Agreements, (unless otherwise provided in the agreement or as determined by the Board and to the extent permitted by applicable law), the Advisor pays the compensation and expenses of all the Board members, officers, and executive employees of the Fund and Portfolio, including its share of payroll taxes, who are affiliated persons of the Advisor.

The Investment Management Agreements provide that the Fund and the Portfolio are each generally responsible for expenses that include: fees payable to the Advisor; outside legal, accounting or auditing expenses, including with respect to expenses related to negotiation, acquisition or distribution of portfolio investments; maintenance of books and records that are maintained by the Fund and the Portfolio, the custodian, or other agents of the Fund and the Portfolio, respectively; taxes and governmental fees; fees and expenses of the Portfolio's, or Fund's, accounting agent, custodian, sub-custodians, depositories, transfer agents, dividend reimbursing agents and registrars; payment for portfolio pricing or valuation services to pricing agents, accountants, bankers and other specialists, if any; brokerage commissions or other costs of acquiring or disposing of any portfolio securities or other instruments of the Fund and the Portfolio; and litigation expenses and other extraordinary expenses not incurred in the ordinary course of the Portfolio's, or Fund's, business.

The Investment Management Agreements allow the Advisor to delegate any of its duties under each agreement to a subadvisor, subject to a majority vote of the Board, including a majority of the Board who are not interested persons, and, if required by applicable law, subject to a majority vote of the shareholders of the Fund or Portfolio, as appropriate.

The Investment Management Agreements provide that the Advisor shall not be liable for any error of judgment or mistake of law or for any loss suffered by the Fund or Portfolio in connection with matters to which the agreement relates, except a loss resulting from willful malfeasance, bad faith or gross negligence on the part of the Advisor in the performance of its duties or from reckless disregard by the Advisor of its obligations and duties under the agreement. The Investment Management Agreements may be terminated at any time, without payment of penalty, by either party or by vote of a majority of the outstanding voting securities of the Portfolio on 60 days' written notice.

Effective July 30, 2007, for all services provided under the Investment Management Agreement with the Fund, the Fund pays the Advisor a fee equal to 0.000% of the Fund's net assets if substantially all of the Fund's assets are invested in the Portfolio. Otherwise the Fund will pay the Advisor a fee, computed daily and paid monthly, at the annual rate as a percentage of net assets shown below:

DWS Money Market Series 0.165% to $1.5 billion
 0.150% next $1.75 billion
 0.135% next $1.75 billion
 0.120% thereafter

Effective August 1, 2007, for all services provided under the Investment Management Agreement with the Portfolio, the Portfolio pays the Advisor a fee, computed and accrued daily and paid monthly, at the annual rate of 0.150% of the first $3 billion of the Portfolio's average daily net assets, 0.133% of the next $4.5 billion of the Portfolio's average daily net assets and 0.120% over $7.5 billion of the Portfolio's average daily net assets. For the period from May 14, 2007 through July 31, 2007, the Portfolio paid the Advisor a fee, computed and accrued daily and paid monthly, at the annual rate of 0.150% of the first $5.5 billion of the Portfolio's average daily net assets, 0.135% of the next $5 billion of the Portfolio's average daily net assets and 0.120% over $10.5 billion of the Portfolio's average daily net assets. Prior to May 14, 2007, the Portfolio paid the Advisor an annual advisory fee of 0.15%, based on its average daily net assets, calculated daily and paid monthly.

For the Fund's period from June 1, 2007 through July 29, 2007, the Advisor aggregated fees of $4,759,371, of which all were waived. For the Fund's fiscal year ended May 31, 2007, the Advisor aggregated fees of $22,087,465, of which all were waived. For the Fund's fiscal year ended May 31, 2006*, the Advisor did not impose fees of $17,730,108 and did impose fees of $10,367,601. For the Fund's fiscal year ended May 31, 2005*, the Advisor did not impose fees of $15,647,929 and did impose fees of $12,557,013. Through July 31, 2004, the Advisor had voluntarily agreed to waive a portion of its investment management fee by 0.15%.

* Prior to June 1, 2006, these fees included an administrative service fee.

For the Portfolio's fiscal year ended December 31, 2007, the Advisor aggregated fees of $27,236,671, of which $6,007,663 was waived.

Effective July 30, 2007, the management fee is accrued and paid by the Cash Management Portfolio and allocated to the Fund.

The Portfolio's Advisor has contractually agreed through July 29, 2010 to waive all or a portion of its management fee and reimburse or pay certain operating expenses (excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest expenses) to the extent necessary to maintain the annual expenses of the Portfolio at 0.15% of the Portfolio's average daily net assets.

Effective February 5, 2008, the Advisor has voluntarily agreed to waive 0.13% of the Fund's total operating expenses. This voluntary waiver or reimbursement may be terminated at any time at the option of the Advisor. Through September 30, 2007, the Advisor has contractually agreed to waive all or a portion of its management fee and reimburse or pay operating expenses of the fund to the extent necessary to maintain the fund's total annual operating expenses at ratios no higher than 0.28% for Premium Class S shares, 0.37% for Prime Reserve Class S shares, 0.20% for Managed Shares and 0.15% for Institutional Shares, respectively, excluding certain expenses such as extraordinary expenses, taxes, brokerage, interest and organizational and offering expenses.

In reviewing the terms of the Investment Management Agreement and in discussions with the Advisor concerning such agreement, the Trustees of the Trust who are not "interested persons" of the Advisor are represented by independent counsel at the Fund's expense.

Officers and employees of the Advisor from time to time may have transactions with various banks, including the Fund's custodian bank. It is the Advisor's opinion that the terms and conditions of those transactions which have occurred were not influenced by existing or potential custodial or other Fund relationships.

The Advisor may enter into arrangements with affiliates and third party service providers to perform various administrative, back-office and other services relating to client accounts. Such service providers may be located in the US or in non-US jurisdictions.

In addition, the Board and shareholders have approved a new subadvisor approval policy for the Fund and the Portfolio (the "Subadvisor Approval Policy"). The Subadvisor Approval Policy permits the Advisor, subject to the approval of the Board, including a majority of its independent board members, to appoint and replace subadvisors and to amend sub-advisory contracts without obtaining shareholder approval. Under the Subadvisor Approval Policy, the Board, including its independent board members, will continue to evaluate and approve all new sub-advisory contracts between the Advisor and any subadvisor, as well as all changes to any existing sub-advisory contract. The Fund and the Portfolio cannot implement the Subadvisor Approval Policy without the SEC either adopting revisions to current rules (as it proposed to do in October 2003) or granting the Fund and the Portfolio exemptive relief from existing rules. The Fund, the Portfolio and the Advisor would be subject to certain conditions imposed by the SEC (and certain conditions that may be imposed in the future within either exemptive relief or a rule) to ensure that the interests of the Fund and the Portfolio and their respective shareholders are adequately protected whenever the Advisor acts under the Subadvisor Approval Policy, including any shareholder notice requirements.

Code of Ethics

The Board of Trustees of the Trust has adopted a Code of Ethics pursuant to Rule 17j-1 under the 1940 Act. The Trust's Code of Ethics permits access persons of the Fund/Portfolio (Board members, officers and employees of the Advisor), to make personal securities transactions for their own accounts. This includes transactions in securities that may be purchased or held by the Fund/Portfolio, but requires compliance with the Code's pre-clearance requirements, subject to certain exceptions. In addition, the Trust's Code of Ethics provides for trading "blackout periods" that prohibit trading of personnel within periods of trading by the Fund/Portfolio in the same security. The Trust's Code of Ethics also prohibits short term trading profits and personal investment in initial public offerings and requires prior approval with respect to purchases of securities in private placements.

The Advisor and its affiliates (including the Fund's Distributor, DWS-SDI) have each adopted a Code of Ethics pursuant to 17j-1 under the 1940 Act (the "Consolidated Code"). The Consolidated Code permits access persons to trade in securities that may be purchased or held by the Fund/Portfolio for their own accounts, subject to compliance with the Consolidated Code's preclearance requirements. In addition, the Consolidated Code also provides for trading "blackout periods" that prohibit trading by personnel within periods of trading by the Portfolio in the same security. The Consolidated Code also prohibits short term trading profits, and personal investment in initial public offerings and requires prior approval with respect to purchases of securities in private placements.

Regulatory Matters and Legal Proceedings

On December 21, 2006, Deutsche Asset Management ("DeAM") settled proceedings with the Securities and Exchange Commission ("SEC") and the New York Attorney General on behalf of Deutsche Asset Management, Inc. ("DAMI") and DIMA, the investment advisors to many of the DWS Scudder funds, regarding allegations of improper trading of fund shares at DeAM and at the legacy Scudder and Kemper organizations prior to their acquisition by DeAM in April 2002. These regulators alleged that although the prospectuses for certain funds in the regulators' view indicated that the funds did not permit market timing, DAMI and DIMA breached their fiduciary duty to those funds in that their efforts to limit trading activity in the funds were not effective at certain times. The regulators also alleged that DAMI and DIMA breached their fiduciary duty to certain funds by entering into certain market timing arrangements with investors. These trading arrangements originated in businesses that existed prior to the currently constituted DeAM organization, which came together as a result of various mergers of the legacy Scudder, Kemper and Deutsche fund groups, and all of the arrangements were terminated prior to the start of the regulatory investigations that began in the summer of 2003. No current DeAM employee approved these trading arrangements. Under the terms of the settlements, DAMI and DIMA neither admitted nor denied any wrongdoing.

The terms of the SEC settlement, which identified improper trading in the legacy Deutsche and Kemper mutual funds only, provide for payment of disgorgement in the amount of $17.2 million. The terms of the settlement with the New York Attorney General provide for payment of disgorgement in the amount of $102.3 million, which is inclusive of the amount payable under the SEC settlement, plus a civil penalty in the amount of $20 million. The total amount payable by DeAM, approximately $122.3 million, will be distributed to shareholders of the affected funds in accordance with a distribution plan to be developed by a distribution consultant. The funds' investment advisors do not believe these amounts will have a material adverse financial impact on them or materially affect their ability to perform under their investment management agreements with the DWS funds. The above-described amounts are not material to Deutsche Bank, and have already been reserved.

Among the terms of the settled orders, DeAM is subject to certain undertakings regarding the conduct of its business in the future, including formation of a Code of Ethics Oversight Committee to oversee all matters relating to issues arising under the advisors' Code of Ethics; establishment of an Internal Compliance Controls Committee having overall compliance oversight responsibility of the advisors; engagement of an Independent Compliance Consultant to conduct a comprehensive review of the advisors' supervisory compliance and other policies and procedures designed to prevent and detect breaches of fiduciary duty, breaches of the Code of Ethics and federal securities law violations by the advisors and their employees; and commencing in 2008, the advisors shall undergo a compliance review by an independent third party.

In addition, DeAM is subject to certain further undertakings relating to the governance of the mutual funds, including that at least 75% of the members of the Boards of Trustees/Directors overseeing the DWS Funds continue to be independent of DeAM; the Chairmen of the DWS Funds' Boards of Trustees/Directors continue to be independent of DeAM; DeAM maintain existing management fee reductions for certain funds for a period of five years and not increase management fees for these certain funds during this period; the funds retain a senior officer (or independent consultants, as applicable) responsible for assisting in the review of fee arrangements and monitoring compliance by the funds and the investment advisors with securities laws, fiduciary duties, codes of ethics and other compliance policies, the expense of which shall be borne by DeAM; and periodic account statements, fund prospectuses and the mutual funds' web site contain additional disclosure and/or tools that assist investors in understanding the fees and costs associated with an investment in the funds and the impact of fees and expenses on fund returns.

DeAM has also settled proceedings with the Illinois Secretary of State regarding market timing matters. The terms of the Illinois settlement provide for investor education contributions totaling approximately $4 million and a payment in the amount of $2 million to the Securities Audit and Enforcement Fund.

On September 28, 2006, the SEC and the National Association of Securities Dealers ("NASD") (now known as FINRA) announced final agreements in which Deutsche Investment Management Americas Inc. ("DIMA"), Deutsche Asset Management, Inc. ("DAMI") and Scudder Distributors, Inc. ("DWS-SDI") (now known as DWS Scudder Distributors, Inc.) settled administrative proceedings regarding disclosure of brokerage allocation practices in connection with sales of the Scudder Funds' (now known as the DWS Scudder Funds) shares during 2001-2003. The agreements with the SEC and NASD are reflected in orders which state, among other things, that DIMA and DAMI failed to disclose potential conflicts of interest to the funds' Boards and to shareholders relating to DWS-SDI's use of certain funds' brokerage commissions to reduce revenue sharing costs to broker-dealer firms with whom it had arrangements to market and distribute Scudder Fund shares. These directed brokerage practices were discontinued in October 2003.

Under the terms of the settlements, in which DIMA, DAMI and DWS-SDI neither admitted nor denied any of the regulators' findings, DIMA, DAMI and DWS-SDI agreed to pay disgorgement, prejudgment interest and civil penalties in the total amount of $19.3 million. The portion of the settlements distributed to the funds was approximately $17.8 million and was paid to the funds as prescribed by the settlement orders based upon the amount of brokerage commissions from each fund used to satisfy revenue sharing agreements with broker-dealers who sold fund shares.

As part of the settlements, DIMA, DAMI and DWS-SDI also agreed to implement certain measures and undertakings relating to revenue sharing payments including making additional disclosures in the funds' Prospectuses or Statements of Additional Information, adopting or modifying relevant policies and procedures and providing regular reporting to the fund Boards.

Additional information announced by DeAM regarding the terms of the settlements is available at www.dws-scudder.com/regulatory_settlements.

The matters alleged in the regulatory settlements described above also serve as the general basis of a number of private class action lawsuits involving the DWS funds. These lawsuits name as defendants various persons, including certain DWS funds, the funds' investment advisors and their affiliates, and certain individuals, including in some cases fund Trustees/Directors, officers, and other parties. Each DWS fund's investment advisor has agreed to indemnify the applicable DWS funds in connection with these lawsuits, or other lawsuits or regulatory actions that may be filed making similar allegations.

Based on currently available information, the funds' investment advisors believe the likelihood that the pending lawsuits will have a material adverse financial impact on a DWS fund is remote and such actions are not likely to materially affect their ability to perform under their investment management agreements with the DWS funds.

SERVICE PROVIDERS

Administrator

The Fund and the Portfolio have entered into administrative services agreements with DIMA (the "Administrator') (the "Administrative Services Agreement"), pursuant to which the Administrator provides administrative services to the Fund and Portfolio including, among others, providing the Fund and Portfolio with personnel, preparing and making required filings on behalf of the Fund and Portfolio, maintaining books and records for the Fund and Portfolio, and monitoring the valuation of securities. For all services provided under the Administrative Services Agreement, the Fund pays the Administrator a fee, computed daily and paid monthly, of 0.100% of the Fund's average daily net assets. For all services provided under the Administrative Services Agreement, the Portfolio pays the Administrator a fee, computed daily and paid monthly, of 0.030% of the Portfolio's average daily net assets.

Under the Administrative Services Agreement, the Administrator is obligated on a continuous basis to provide such administrative services as the Board of the Fund and Portfolio reasonably deems necessary for the proper administration of the Fund and Portfolio. The Administrator provides the Fund and Portfolio with personnel; arranges for the preparation and filing of the Fund's and Portfolio's tax returns; prepares and submits reports and meeting materials to the Board and the shareholders; prepares and files updates to the Fund's and Portfolio's prospectus and statement of additional information as well as other reports required to be filed by the SEC; maintains the Fund's and Portfolio's records; provides the Fund and Portfolio with office space, equipment and services; supervises, negotiates the contracts of and monitors the performance of third parties contractors; oversees the tabulation of proxies; monitors the valuation of portfolio securities and monitors compliance with Board-approved valuation procedures; assists in establishing the accounting and tax policies of the Fund and Portfolio; assists in the resolution of accounting issues that may arise with respect to the Fund and Portfolio; establishes and monitors the Fund's and Portfolio's operating expense budgets; reviews and processes the Fund's and Portfolio's bills; assists in determining the amount of dividends and distributions available to be paid by the Fund and Portfolio, prepares and arranges dividend notifications and provides information to agents to effect payments thereof; provides to the Board periodic and special reports; provides assistance with investor and public relations matters; and monitors the registration of shares under applicable federal and state law. The Administrator also performs certain fund accounting services under the Administrative Services Agreement. The Administrative Services Agreement provides that the Administrator will not be liable under the Administrative Services Agreement except for willful misfeasance, bad faith or negligence in the performance of its duties or from the reckless disregard by it of its duties and obligations thereunder.

Pursuant to an agreement between the Administrator and State Street Bank and Trust Company, the Administrator has delegated certain administrative functions to SSB. The costs and expenses of such delegation are borne by the Administrator, not by the Fund and Portfolio.

The fee payable by the Fund and Portfolio to the Administrator pursuant to the Administrative Services Agreement is reduced by the amount of any credit received from the custodian for cash balances.

For the period June 1, 2007 through December 31, 2007, and for the year ended May 31, 2007, the Advisor received $13,812,319 and $17,270,804, respectively, as compensation for administrative services provided to the Fund, of which $10,801,752 and $2,438,267, respectively, were waived.

Through July 29, 2010, the Advisor has contractually agreed to waive all or a portion of its administrative services fee and reimburse or pay operating expenses of the Fund to the extent necessary to maintain the Fund's total operating expenses at 0.28% for Premium Class S shares, 0.37% for Prime Reserve Class S shares, 0.15% for Institutional Shares and 0.20% for Managed Shares, excluding certain expenses such as extraordinary expenses, taxes, brokerage and interest.

For the one-month ended June 30, 2007, DIMA received $1,772,787 as compensation for administrative services provided to the Fund, of which $411,904 was waived. For the fiscal year ended May 31, 2007, DIMA received $17,270,804 as compensation for administrative services provided to the Fund, of which $2,438,367 was waived.

For the year ended December 31, 2007, the Advisor received $6,287,793 as compensation for administrative services provided to the Portfolio, of which $911,650 is unpaid as of December 31, 2007.

Prior to June 1, 2006, DWS Scudder Fund Accounting Corporation ("DWS-SFAC"), a subsidiary of the Advisor, was responsible for determining the daily net asset value per share of the Fund and maintaining portfolio and general accounting records. For the fiscal year ended May 31, 2006, the amount charged to the Fund by DWS-SFAC for accounting services aggregated $513,308. For the fiscal year ended May 31, 2005, the amount charged to the Fund by DWS-SFAC for accounting services aggregated $378,535.

Pursuant to DeAM procedures approved by the Boards on behalf of the DWS funds, proof of claim forms are routinely filed on behalf of the DWS funds by a third party service provider, with certain limited exceptions. The Boards of the DWS funds receive periodic reports regarding the implementation of these procedures.

Distributor

Effective September 30, 2002, the Trust has an underwriting agreement with DWS Scudder Distributors, Inc. ("DWS-SDI" or the "Distributor"), 222 South Riverside Plaza, Chicago, Illinois 60606, an affiliate of the Advisor, serves as distributor and principal underwriter for the Trust to provide information and services for existing and potential shareholders. The distribution agreement provides that DWS-SDI shall appoint various firms to provide cash management services for their customers or clients through the Fund. The Trust's underwriting agreement was last approved by the Trustees on September 19, 2007 and will remain in effect until September 30, 2008.

Under the underwriting agreement, the Fund is responsible for: the payment of all fees and expenses in connection with the preparation and filing with the SEC of its registration statement and prospectus and any amendments and supplements thereto; the registration and qualification of shares for sale in the various states, including registering the Fund as a broker or dealer in various states, as required; the fees and expenses of preparing, printing and mailing prospectuses annually to existing shareholders (see below for expenses relating to prospectuses paid by the Distributor); notices, proxy statements, reports or other communications to shareholders of the Fund; the cost of printing and mailing confirmations of purchases of shares and any prospectuses accompanying such confirmations; any issuance taxes and/or any initial transfer taxes; a portion of shareholder toll-free telephone charges and expenses of shareholder service representatives; the cost of wiring funds for share purchases and redemptions (unless paid by the shareholder who initiates the transaction); the cost of printing and postage of business reply envelopes; and a portion of the cost of computer terminals used by both the Fund and the Distributor.

The Distributor will pay for printing and distributing prospectuses or reports prepared for its use in connection with the offering of the Fund's shares to the public and preparing, printing and mailing any other literature or advertising in connection with the offering of shares of the Fund to the public. The Distributor will pay all fees and expenses in connection with its qualification and registration as a broker or dealer under federal and state laws, a portion of the cost of toll-free telephone service and expenses of shareholder service representatives, a portion of the cost of computer terminals, and expenses of any activity which is primarily intended to result in the sale of shares issued by the Fund.

The Distributor currently offers shares of the Fund on a continuous basis to investors in all states in which shares of the Fund may from time to time be registered or where permitted by applicable law. The underwriting agreement provides that the Distributor accepts orders for shares at net asset value as no sales commission or load is charged to the investor. The Distributor has made no firm commitment to acquire shares of the Fund.

Although the Fund does not currently have a 12b-1 Plan, and the Trustees have no current intention of adopting one, a Fund will also pay those fees and expenses permitted to be paid or assumed by the Trust pursuant to a 12b-1 Plan, if any, adopted by the Trust, notwithstanding any other provision to the contrary in the underwriting agreement.

Custodian

State Street Bank and Trust Company, ("SSB" or the "Custodian"), 225 Franklin Street, Boston, Massachusetts 02101, serves as custodian for the Trust and the Portfolio. As Custodian, SSB holds the Portfolio's assets.

Transfer Agent and Shareholder Service Agent

DWS Scudder Investments Service Company ("DWS-SISC" or the "Transfer Agent"), 210 West 10th Street, Kansas City, Missouri 64105-1614, an affiliate of the Advisor, is the transfer, dividend-paying and shareholder service agent for the Fund and as such performs the customary services of a Transfer Agent and dividend disbursing agent. These services include, but are not limited to: (i) receiving for acceptance in proper form orders for the purchase or redemption of Fund shares and promptly effecting such orders; (ii) recording purchases of Fund shares and, if requested, issuing stock certificates; (iii) reinvesting dividends and distributions in additional shares or transmitting payments therefor; (iv) receiving for acceptance in proper form transfer requests and effecting such transfers; (v) responding to shareholder inquiries and correspondence regarding shareholder account status; (vi) reporting abandoned property to the various states; and (vii) recording and monitoring daily the issuance in each state of shares of the Fund of the Trust.

The Transfer Agent receives an annual service fee for each account of the Fund, based on the type of account. For open retail accounts, the fee is a flat fee ranging from $20.00 to $27.50 per account, for open wholesale money funds the fee is $32.50 per account, while for certain retirement accounts serviced on the recordkeeping system of ADP, Inc., the fee is a flat fee up to $3.60 per account (as of 2007, indexed to inflation) plus an asset based fee of up to 0.25% of average net assets. 1/12th of the annual service charge for each account is charged and payable to the Transfer Agent each month. A fee is charged for any account which at any time during the month had a share balance in the Fund. Smaller fees are also charged for closed accounts for which information must be retained on the Transfer Agent's system for up to 18 months after closing for tax reporting purposes.

Certain out-of-pocket expenses incurred by the Transfer Agent, including expenses of printing and mailing routine fund disclosure documents, costs of record retention and transaction processing costs are reimbursed by the Fund or are paid directly by the Fund. Certain additional out-of-pocket expenses, including costs of computer hardware and software, third party record-keeping and processing of proxy statements, may only be reimbursed by the Fund with the prior approval of the Fund's Board.

Pursuant to a sub-transfer agency agreement between DWS-SISC and DST Systems, Inc. ("DST"), DWS-SISC has delegated certain transfer agent, dividend paying agent and shareholder servicing agent functions to DST. The costs and expenses of such delegation are borne by DWS-SISC, not by the Fund.

For the fiscal year ended May 31, 2005, the following amounts were charged to the classes of the Fund by DWS Scudder Corporation ("DWS-SSC") (the Fund's former transfer agent through March 31, 2007):

Prime Reserve Class S $69,044
Premium Class S $196,414
Managed Shares $57,026
Institutional Shares $44,032

For the fiscal year ended May 31, 2006, the following amounts were charged to the classes of the Fund by DWS-SSC:

Prime Reserve Class S $65,338
Premium Class S $182,806
Managed Shares $54,508
Institutional Shares $59,075

For the fiscal year ended May 31, 2007, the following amounts were charged to the classes of the Fund by DWS-SISC and DWS-SSC (prior to April 1, 2007):

Prime Reserve Class S $137,289
Premium Class S $257,015
Managed Shares $26,509
Institutional Shares $423,368

For the period from June 1, 2007 through December 31, 2007, the following amounts were charged to the classes of the Fund by DWS-SISC:

 Unpaid at
 December 31,
Fund Class Total Amount Waived 2007
---- ----- ----- ------------- ----

DWS Money Market Series Prime Reserve $76,387 $3,003 $19,688
 Class S
DWS Money Market Series Premium Class S $150,890 $18,745 $24,495
DWS Money Market Series Managed Shares $9,404 $9,404 --
DWS Money Market Series Institutional $666,267 $594,794 --
 Shares

Legal Counsel

Ropes and Gray LLP, One International Place, Boston, MA 02110 serves as legal counsel for the Fund and the Independent Trustees of the Fund.

Independent Registered Public Accounting Firm

The financial highlights of the Fund included in the prospectuses and the Financial Statements incorporated by reference in this Statement of Additional Information have been so included or incorporated by reference in reliance on the report of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm, 125 High Street, Boston, MA 02110-2624, independent accountants, given on the authority of said firm as experts in auditing and accounting. PricewaterhouseCoopers LLP audits the financial statements of the Fund and provides other audit, tax and related services. Shareholders will receive annual audited financial statements and semi-annual unaudited financial statements.

PORTFOLIO TRANSACTIONS

The Advisor is generally responsible for placing the orders for the purchase and sale of portfolio securities, including the allocation of brokerage. With respect to those funds for which a sub-investment advisor manages the fund's investments, references in this section to the "Advisor" should be read to mean the Sub-Advisor, except as noted below.

The policy of the Advisor in placing orders for the purchase and sale of securities for the Portfolio is to seek best execution, taking into account such factors, among others, as price; commission (where applicable); the broker-dealer's ability to ensure that securities will be delivered on settlement date; the willingness of the broker-dealer to commit its capital and purchase a thinly traded security for its own inventory; whether the broker-dealer specializes in block orders or large program trades; the broker-dealer's knowledge of the market and the security; the broker-dealer's ability to maintain confidentiality; the broker-dealer's ability to provide access to new issues; the broker-dealer's ability to provide support when placing a difficult trade; the financial condition of the broker-dealer; and whether the broker-dealer has the infrastructure and operational capabilities to execute and settle the trade. The Advisor seeks to evaluate the overall reasonableness of brokerage commissions with commissions charged on comparable transactions and compares the brokerage commissions (if any) paid by the Portfolio to reported commissions paid by others. The Advisor routinely reviews commission rates, execution and settlement services performed and makes internal and external comparisons.

Commission rates on transactions in equity securities on US securities exchanges are subject to negotiation. Commission rates on transactions in equity securities on foreign securities exchanges are generally fixed. Purchases and sales of fixed-income securities and certain over-the-counter securities are effected on a net basis, without the payment of brokerage commissions. Transactions in fixed income and certain over-the-counter securities are generally placed by the Advisor with the principal market makers for these securities unless the Advisor reasonably believes more favorable results are available elsewhere. Transactions with dealers serving as market makers reflect the spread between the bid and asked prices. Purchases of underwritten issues will include an underwriting fee paid to the underwriter. Money market instruments are normally purchased in principal transactions directly from the issuer or from an underwriter or market maker.

It is likely that the broker-dealers selected based on the considerations described in this section will include firms that also sell shares of the Portfolio to their customers. However, the Advisor does not consider sales of shares of the Portfolio as a factor in the selection of broker-dealers to execute portfolio transactions for the Portfolio and, accordingly, has implemented policies and procedures reasonably designed to prevent its traders from considering sales of shares of the Portfolio as a factor in the selection of broker-dealers to execute portfolio transactions for the Portfolio.

The Advisor is permitted by Section 28(e) of the Securities Exchange Act of 1934, as amended ("1934 Act"), when placing portfolio transactions for a Portfolio, to cause the Portfolio to pay brokerage commissions in excess of that which another broker-dealer might charge for executing the same transaction in order to obtain research and brokerage services if the Advisor determines that such commissions are reasonable in relation to the overall services provided. The Advisor may from time to time, in reliance on Section 28(e) of the 1934 Act, execute portfolio transactions with broker-dealers that provide research and brokerage services to the Advisor. Consistent with the Advisor's policy regarding best execution, where more than one broker is believed to be capable of providing best execution for a particular trade, the Advisor may take into consideration the receipt of research and brokerage services in selecting the broker-dealer to execute the trade. Although certain research and brokerage services from broker-dealers may be useful to a Portfolio and to the Advisor, it is the opinion of the Advisor that such information only supplements its own research effort since the information must still be analyzed, weighed and reviewed by the Advisor's staff. To the extent that research and brokerage services of value are received by the Advisor, the Advisor may avoid expenses that it might otherwise incur. Research and brokerage services received from a broker-dealer may be useful to the Advisor and its affiliates in providing investment management services to all or some of its clients, which includes a Portfolio. Services received from broker-dealers that executed securities transactions for a Portfolio will not necessarily be used by the Advisor specifically to service such Portfolio.

Research and brokerage services provided by broker-dealers may include, but are not limited to, information on the economy, industries, groups of securities, individual companies, statistical information, accounting and tax law interpretations, political developments, legal developments affecting portfolio securities, technical market action, pricing and appraisal services, credit analysis, risk measurement analysis, performance analysis and measurement and analysis of corporate responsibility issues. Research and brokerage services are typically received in the form of written or electronic reports, access to specialized financial publications, telephone contacts and personal meetings with security analysts, but may also be provided in the form of access to various computer software and meetings arranged with corporate and industry representatives.

The Advisor may also select broker-dealers and obtain from them research and brokerage services that are used in connection with executing trades provided that such services are consistent with interpretations under Section 28(e) of the 1934 Act. Typically, these services take the form of computer software and/or electronic communication services used by the Advisor to facilitate trading activity with those broker-dealers.

Research and brokerage services may include products obtained from third parties if the Advisor determines that such product or service constitutes brokerage and research as defined in Section 28(e) and interpretations thereunder. Currently, it is the Advisor's policy that Sub-Advisors may not execute portfolio transactions on behalf of the Portfolio to obtain third party research and brokerage services. The Advisor may, in the future, change this policy. Regardless, certain Sub-Advisors may, as matter of internal policy, limit or preclude third party research and brokerage services.

The Advisor may use brokerage commissions to obtain certain brokerage products or services that have a mixed use (i.e., it also serves a function that does not relate to the investment decision-making process). In those circumstances, the Advisor will make a good faith judgment to evaluate the various benefits and uses to which it intends to put the mixed use product or service and will pay for that portion of the mixed use product or service that it reasonably believes does not constitute research and brokerage services with its own resources.

DIMA will monitor regulatory developments and market practice in the use of client commissions to obtain research and brokerage services and may adjust its portfolio transactions policies in response thereto.

Investment decisions for each Portfolio and for other investment accounts managed by the Advisor are made independently of each other in light of differing conditions. However, the same investment decision may be made for two or more of such accounts. In such cases, simultaneous transactions are inevitable. To the extent permitted by law, the Advisor may aggregate the securities to be sold or purchased for a Portfolio with those to be sold or purchased for other accounts in executing transactions. Purchases or sales are then averaged as to price and commission and allocated as to amount in a manner deemed equitable to each account. While in some cases this practice could have a detrimental effect on the price paid or received by, or on the size of the position obtained or disposed of for, the Portfolio, in other cases it is believed that the ability to engage in volume transactions will be beneficial to the Portfolio.

DIMA and its affiliates and the Portfolio's management team manage other mutual funds and separate accounts, some of which use short sales of securities as a part of its investment strategy. The simultaneous management of long and short portfolios creates potential conflicts of interest including the risk that short sale activity could adversely affect the market value of the long positions (and vice versa), the risk arising from sequential orders in long and short positions, and the risks associated with receiving opposing orders at the same time.

DIMA has adopted procedures that it believes are reasonably designed to mitigate these potential conflicts of interest. Incorporated in the procedures are specific guidelines developed to ensure fair and equitable treatment for all clients. DIMA and the investment team have established monitoring procedures and a protocol for supervisory reviews, as well as compliance oversight to ensure that potential conflicts of interest relating to this type of activity are properly addressed.

Deutsche Bank AG or one of its affiliates (or in the case of a Sub-Advisor, the Sub-Advisor or one of its affiliates) may act as a broker for the Portfolio and receive brokerage commissions or other transaction-related compensation from the Portfolio in the purchase and sale of securities, options or futures contracts when, in the judgment of the Advisor, and in accordance with procedures approved by the Portfolio's Board, the affiliated broker will be able to obtain a price and execution at least as favorable as those obtained from other qualified brokers and if, in the transaction, the affiliated broker charges the Portfolio a rate consistent with that charged to comparable unaffiliated customers in similar transactions.

Money market instruments are normally purchased in principal transactions directly from the issuer or from an underwriter or market maker. There usually are no brokerage commissions paid by the Portfolio for such purchases. During the last three fiscal years the Portfolio paid no portfolio brokerage commissions. Purchases from underwriters will include a commission or concession paid by the issuer to the underwriter, and purchases from dealers serving as market makers will include the spread between the bid and asked prices.

During the last three fiscal years, neither the Portfolio nor the Fund paid any brokerage commissions.

Portfolio Turnover

The Portfolio may attempt to increase yields by trading to take advantage of short-term market variations, which results in higher portfolio turnover. This policy does not result in higher brokerage commissions to the Portfolio as the purchases and sales of portfolio securities are usually effected as principal transactions. The Portfolio's turnover rates are not expected to have a material effect on its income and have been and are expected to be zero for regulatory reporting purposes.

PURCHASE AND REDEMPTION OF SHARES

General Information

Policies and procedures affecting transactions in Fund shares can be changed at any time without notice, subject to applicable law. Transactions may be contingent upon proper completion of application forms and other documents by shareholders and their receipt by the Fund's agents. Transaction delays in processing (and changing account features) due to circumstances within or beyond the control of the Fund and its agents may occur. Shareholders (or their financial service firms) are responsible for all losses and fees resulting from bad checks, cancelled orders or the failure to consummate transactions effected pursuant to instructions reasonably believed to be genuine.

A distribution will be reinvested in shares of the same Fund and class if the distribution check is returned as undeliverable.

Minimum Balances for Managed Shares

The initial minimum investment requirement in the Managed Shares of the Fund is $100,000. Shareholders should maintain a share balance worth at least $100,000 (which minimum amount may be changed by the Board of Trustees).

Shareholders whose account balance falls below $100,000 for at least 30 days will be given 60 days' notice to bring the account back up to $100,000 or more. Where a reduction in value has occurred due to a redemption or exchange out of the account and the account balance is not increased in 60 days, the Advisor reserves the right to redeem all shares and close the account and send the proceeds to the shareholder's address of record. Reductions in value that result solely from market activity will not trigger an involuntary redemption.

Minimum Balances for Prime Reserve Class S Shares

Initial minimum investment in these shares is $10,000. Shareholders should maintain a share balance worth at least $7,500. Account balances will be reviewed periodically and the Advisor reserves the right, following 60 days' written notice to shareholders, to redeem all shares in accounts that have a value below $7,500 where such a reduction in value has occurred due to a redemption, exchange, or transfer out of the account.

Minimum Balances for Premium Class S Shares

Initial minimum investment in these shares is $25,000. Shareholders should maintain a share balance worth at least $20,000. Account balances will be reviewed periodically and the Advisor reserves the right, following 60 days' written notice to shareholders, to redeem all shares in accounts that have a value below $20,000 where such a reduction in value has occurred due to a redemption, exchange, or transfer out of the account.

Minimum Balance for Institutional Shares of DWS Money Market Series

The initial minimum investment requirement in the Institutional Shares of the Fund is $1,000,000. Shareholders should maintain a share balance worth at least $1,000,000 (which minimum amount may be changed by the Board of Trustees).

Shareholders whose account balance falls below $1,000,000 for at least 30 days may be given 60 days' notice to bring the account back up to $1,000,000 or more. Where a reduction in value has occurred due to a redemption out of the account and the account balance is not increased in 60 days, the Advisor reserves the right to redeem all shares and close the account and send the proceeds to the shareholder's address of record. Reductions in value that result solely from market activity will not trigger an involuntary redemption.

Share Certificates

Due to the desire of the Fund's management to afford ease of redemption, certificates will not be issued to indicate ownership in the Fund. Share certificates now in a shareholder's possession may be sent to the Fund's Transfer Agent for cancellation and credit to such shareholder's account. Shareholders who prefer may hold the certificates in their possession until they wish to exchange or redeem such shares.

Use of Financial Services Firms. Investment dealers and other firms provide varying arrangements for their clients to purchase and redeem the Fund's shares, including different minimum investments, and may assess transaction or other fees. Firms may arrange with their clients for other investment or administrative services. Such firms may independently establish and charge additional amounts to their clients for such services. Firms also may hold the Fund's shares in nominee or street name as agent for and on behalf of their customers. In such instances, the Fund's transfer agent will have no information with respect to or control over the accounts of specific shareholders. Such shareholders may obtain access to their accounts and information about their accounts only from their firm. Certain of these firms may receive compensation from the Fund through the shareholder service agent for record-keeping and other expenses relating to these nominee accounts. In addition, certain privileges with respect to the purchase and redemption of shares or the reinvestment of dividends may not be available through such firms. Some firms may participate in a program allowing them access to their clients' accounts for servicing including, without limitation, transfers of registration and dividend payee changes; and may perform functions such as generation of confirmation statements and disbursement of cash dividends. Such firms, including affiliates of DWS-SDI, may receive compensation from the Fund through the Shareholder Service Agent for these services.

The Fund has authorized one or more financial service institutions, including certain members of the FINRA other than the Distributor ("financial institutions"), to accept purchase and redemption orders for the Fund's shares. Such financial institutions may also designate other parties, including plan administrator intermediaries, to accept purchase and redemption orders on the Fund's behalf. Orders for purchases or redemptions will be deemed to have been received by the Fund when such financial institutions or, if applicable, their authorized designees accept the orders. Subject to the terms of the contract between the Fund and the financial institution, ordinarily orders will be priced at the Fund's net asset value next computed after acceptance by such financial institution or its authorized designees and accepted by the Fund. Further, if purchases or redemptions of the Fund's shares are arranged and settlement is made at an investor's election through any other authorized financial institution, that financial institution may, at its discretion, charge a fee for that service. The Board of Trustees and the Distributor, also the Fund's principal underwriter, each has the right to limit the amount of purchases by, and to refuse to sell to, any person. The Trustees and the Distributor may suspend or terminate the offering of shares of the Fund at any time for any reason.

DWS-SDI has adopted an Incentive Plan (the "Plan") covering wholesalers that are regional vice presidents ("DWS Scudder Wholesalers"). Generally, DWS Scudder Wholesalers market shares of the DWS funds to financial advisors, who in turn may recommend that investors purchase shares of a DWS fund. The Plan is an incentive program that combines a monthly incentive component with a quarterly strategic bonus component. Under the Plan, DWS Scudder Wholesalers will receive a monetary monthly incentive based on the amount of sales generated from their marketing of the funds, and that incentive will differ depending on the product category of the fund. Each fund is assigned to one of three product categories -- "Strategic," "Tactical" or "all other funds" -- taking into consideration, among other things, the following criteria, where applicable:

o The Fund's consistency with DWS Scudder's branding and long-term strategy.
o The Fund's competitive performance;
o The Fund's Morningstar rating;
o The length of time the Fund's Portfolio Managers have managed the Fund/Strategy
o Market size for the fund category;
o The Fund's size, including sales and redemptions of the Fund's shares

This information and other factors are presented to a committee comprised of representatives from various groups within DWS Scudder, who review on a quarterly basis the funds assigned to each product category described above, and make any changes to those assignments at that time. No one factor, whether positive or negative, determines a fund's placement in a given category; all these factors together are considered, and the designation of funds in the Strategic and Tactical categories represents management's judgment based on the above criteria. In addition, management may consider a fund's profile over the course of several review periods before making a change to its category assignment. These category assignments will be posted quarterly to the DWS funds' Web site at www.dws-scudder.com, approximately one month after the end of each quarter. DWS Scudder Wholesalers receive the highest compensation for Strategic funds, less for Tactical funds and the lowest for all other funds. The level of compensation among these categories may differ significantly.

The prospect of receiving, or the receipt of, additional compensation by a DWS Scudder Wholesaler under the Plan may provide an incentive to favor marketing the Strategic or Tactical funds over all other funds. The Plan, however, will not change the price that investors pay for shares of a fund. The DWS Scudder Compliance Department monitors DWS Scudder Wholesaler sales and other activity in an effort to detect unusual activity in the context of the compensation structure under the Plan. However, investors may wish to take the Plan and the product category of the fund into account when considering purchasing a fund or evaluating any recommendations relating to fund shares.

Telephone and Electronic Transaction Procedures. Shareholders have various telephone, Internet, wire and other electronic privileges available. The Fund or its agents will not be liable for any losses, expenses or costs arising out of fraudulent or unauthorized instructions pursuant to these privileges if the Fund or its agents reasonably believe, based upon reasonable verification procedures, that the instructions were genuine. Verification procedures include recording instructions, requiring certain identifying information before acting upon instructions and sending written confirmations. During periods when it is difficult to contact the Shareholder Service Agent, it may be difficult to use telephone, wire and other privileges.

Dividend Payment Option. Investors may have dividends and distributions automatically deposited to their predesignated bank account through DWS Scudder's Dividend Payment Option request form. Shareholders whose predesignated checking account of record is with a member bank of Automated Clearing House Network (ACH) can have income and capital gain distributions automatically deposited to their personal bank account usually within three business days after the Fund pays its distribution. A Dividend Payment Option request form can be obtained by visiting our Web site at: www.dws-scudder.com or calling (800) 728-3337 for Premium Class S shares and Prime Reserve Class S shares and (800) 730-1313 for Managed Shares. Confirmation Statements will be mailed to shareholders as notification that distributions have been deposited.

Tax-Sheltered Retirement Plans. The Shareholder Service Agent provides retirement plan services and documents and the Distributor can establish investor accounts in any of the following types of retirement plans: Brochures describing these plans as well as model defined benefit plans, target benefit plans, 457 plans, 401(k) plans, simple 401(k) plans and materials for establishing them are available from the Shareholder Service Agent upon request. Additional fees and transaction policies and procedures may apply to such plans. Investors should consult with their own tax advisors before establishing a retirement plan.

o Traditional, Roth and Education IRAs. This includes Savings Incentive Match Plan for Employees of Small Employers ("SIMPLE"), Simplified Employee Pension Plan ("SEP") IRA accounts and prototype documents.

o 403(b)(7) Custodial Accounts. This type of plan is available to employees of most non-profit organizations.

o Prototype money purchase pension and profit-sharing plans may be adopted by employers.

Purchases

The Fund reserves the right to withdraw all or any part of the offering made by its prospectus and to reject purchase orders for any reason. Also, from time to time, the Fund may temporarily suspend the offering of any class of its shares to new investors. During the period of such suspension, persons who are already shareholders of such class of such Fund may be permitted to continue to purchase additional shares of such class and to have dividends reinvested.

To help the government fight the funding of terrorism and money laundering activities, federal law requires all financial institutions to obtain, verify and record information that identifies each person who opens an account. For more information, please see "Policies You Should Know About" in the Fund's prospectuses.

Only certain investors are eligible to buy Prime Reserve Class S and Premium Class S shares, as described in greater detail below.

A. The following investors may purchase Class S shares of DWS Funds either
(i) directly from DWS-SDI, the Fund's principal underwriter; or (ii) through an intermediary relationship with a financial services firm established with respect to the DWS Funds as of December 31, 2004.

1. Existing shareholders of Class S shares of any DWS Fund as of December 31, 2004, and household members residing at the same address.

2. Shareholders of Class S of any DWS Fund who became Class S shareholders in connection with the consolidation of Class AARP and Class S on July 17, 2006 and household members residing at the same address.

3. Shareholders who have owned Class S shares continuously since December 31, 2004 and household members residing at the same address may open new accounts for Class S shares of any DWS Fund.

4. Any participant who has owned Class S shares of any DWS Fund through an employee sponsored retirement, employee stock, bonus, pension or profit sharing plan continuously since December 31, 2004 may open a new individual account for Class S shares of any DWS Fund.

5. Any participant who owns Class S shares of any DWS Fund through a retirement, employee stock, bonus, pension or profit sharing plan may complete a direct rollover to an IRA account that will hold Class S shares. This applies to individuals who begin their retirement plan investments with a DWS Fund at any time, including after December 31, 2004.

6. Officers, Fund Trustees and Directors, and full-time employees and their family members, of the Advisor and its affiliates.

7. Class S shares are available to any accounts managed by the Advisor, any advisory products offered by the Advisor or DWS-SDI and to DWS Allocation Series or other fund of funds managed by the Advisor or its affiliates.

8. Shareholders of Class S of DWS Emerging Markets Equity Fund who became shareholders of the fund in connection with the fund's acquisition of Scudder New Asia Fund, Inc. on April 17, 2006.

9. Shareholders of Class S of any DWS Fund who became Class S shareholders in connection with the consolidation of Class M and Class S on August 18, 2006 and household members residing at the same address.

10. Shareholders of Class S of any DWS Fund who became Class S shareholders in connection with the renaming or conversion of Investment Class to Class S on October 23, 2006.

B. The following additional investors may purchase Class S shares of DWS Funds.

1. Broker-dealers, banks and registered investment advisors ("RIAs") may purchase Class S shares in connection with a comprehensive or "wrap" fee program or other fee based program.

2. Any group retirement, employee stock, bonus, pension or profit-sharing plans.

3. Persons who purchase shares as part of an investment only placement in a 529 College Savings Plan.

4. Persons who purchase shares through a Health Savings Account or a Voluntary Employees' Benefit Association ("VEBA") Trust.

DWS-SDI may, at its discretion, require appropriate documentation that shows an investor is eligible to purchase Prime Reserve Class S and Premium Class S shares.

It is our policy to offer purchase privileges to current or former directors or trustees of the Deutsche or DWS mutual funds, employees, their spouses or life partners and children or stepchildren age 21 or younger of Deutsche Bank or its affiliates or a sub-adviser to any fund in the DWS family of funds or a broker-dealer authorized to sell shares of the funds. Qualified individuals will generally be allowed to purchase shares in the class with the lowest expense ratio, usually the Institutional Class. If the Fund does not offer Institutional Class shares, these individuals will be allowed to buy Class A shares at NAV. The Fund also reserves the right to waive the minimum account balance requirement for employees and director accounts. Fees generally charged to IRA accounts will be charged to accounts of employees and directors.

Revenue Sharing

In light of recent regulatory developments, the Advisor, the Distributor and their affiliates have undertaken to furnish certain additional information below regarding the level of payments made by them to selected affiliated and unaffiliated brokers, dealers, participating insurance companies or other financial intermediaries ("financial advisors") in connection with the sale and/or distribution of Fund shares or the retention and/or servicing of investors and Fund shares ("revenue sharing").

The Advisor, the Distributor and/or their affiliates may pay additional compensation, out of their own assets and not as an additional charge to each Fund, to financial advisors in connection with the sale and/or distribution of Fund shares or the retention and/or servicing of Fund investors and Fund shares. Such revenue sharing payments are in addition to any distribution or service fees payable under any Rule 12b-1 or service plan of any fund, any record keeping/sub-transfer agency/networking fees payable by each Fund (generally through the Distributor or an affiliate) and/or the Distributor to certain financial advisors for performing such services and any sales charges, commissions, non-cash compensation arrangements expressly permitted under applicable rules of FINRA or other concessions described in the fee table or elsewhere in the Prospectuses or the SAI as payable to all financial advisors. For example, the Advisor, the Distributor and/or their affiliates may compensate financial advisors for providing each Fund with "shelf space" or access to a third party platform or fund offering list, or other marketing programs including, without limitation, inclusion of each Fund on preferred or recommended sales lists, mutual fund "supermarket" platforms and other formal sales programs; granting the Distributor access to the financial advisor's sales force; granting the Distributor access to the financial advisor's conferences and meetings; assistance in training and educating the financial advisor's personnel; and, obtaining other forms of marketing support. The level of revenue sharing payments made to financial advisors may be a fixed fee or based upon one or more of the following factors: gross sales, current assets and/or number of accounts of each Fund attributable to the financial advisor, the particular fund or fund type or other measures as agreed to by the Advisor, the Distributor and/or their affiliates and the financial advisors or any combination thereof. The amount of these payments is determined at the discretion of the Advisor, the Distributor and/or their affiliates from time to time, may be substantial, and may be different for different financial advisors based on, for example, the nature of the services provided by the financial advisor.

The Advisor, the Distributor and/or their affiliates currently make revenue sharing payments from their own assets in connection with the sale and/or distribution of DWS Fund shares, or the retention and/or servicing of investors, to financial advisors in amounts that generally range from .01% up to .50% of assets of the Fund serviced and maintained by the financial advisor, .10% to .25% of sales of the Fund attributable to the financial advisor, a flat fee of $13,350 up to $500,000, or any combination thereof. These amounts are annual figures typically paid on a quarterly basis and are subject to change at the discretion of the Advisor, the Distributor and/or their affiliates. Receipt of, or the prospect of receiving, this additional compensation, may influence your financial advisor's recommendation of this Fund or of any particular share class of the Fund. You should review your financial advisor's compensation disclosure and/or talk to your financial advisor to obtain more information on how this compensation may have influenced your financial advisor's recommendation of this Fund.

As of the date hereof, each Fund has been advised that the Advisor, the Distributor and their affiliates expect that the following firms will receive revenue sharing payments at different points during the coming year as described above:

Channel: Broker-Dealers and Financial Advisors

AIG Advisors Group
Ameriprise
Cadaret, Grant & Co. Inc.
Capital Analyst, Incorporated
Citigroup Global Markets, Inc. (dba Smith Barney) Commonwealth Equity Services, LLP (dba Commonwealth Financial Network) Deutsche Bank group
First Clearing/Wachovia Securities
Fiserv Trust Company
HD Vest Investment Securities, Inc.
ING Group
John Hancock Distributors LLC
LPL Financial
M.L. Stern & Co.
Marsh Insurance and Investment Company
Meridien Financial Group
Merrill Lynch, Pierce, Fenner & Smith Inc. Morgan Stanley
Oppenheimer & Co., Inc.
Raymond James & Associates
Raymond James Financial Services
RBC Dain Rauscher, Inc
Securities America, Inc.
UBS Financial Services
Wachovia Securities
Wells Fargo Investments, LLC

Channel: Cash Product Platform

Allegheny Investments LTD
Bank of New York (Hare & Co.)
Bear, Stearns Securities Corp.
Brown Brothers Harriman

Brown Investment Advisory & Trust Company Cadaret Grant & Co.
Chicago Mercantile Exchange
D.A. Davidson & Company
Deutsche Bank Group
Emmett A. Larkin Company
Fiduciary Trust Co. - International
First Southwest Company
Huntleigh Securities
Lincoln Investment Planning
LPL Financial
Mellon Financial Markets LLC
Penson Financial Services
Pershing Choice Platform
ProFunds Distributors, Inc.
Ridge Clearing & Outsourcing Solutions
Romano Brothers and Company
SAMCO Capital Markets
Smith Moore & Company
Sungard Institutional Brokerage Inc.
US Bancorp
UBS
William Blair & Company

Channel: Third Party Insurance Platforms

Allstate Life Insurance Company of New York Ameritas Life Insurance Group
Annuity Investors Life Insurance Company Columbus Life Insurance Company
Commonwealth Annuity and Life Insurance Company Companion Life Insurance Company
Connecticut General Life Insurance Company Farmers New World Life Insurance Company Fidelity Security Life Insurance Company First Allmerica Financial Life Insurance Company First Great West Life and Annuity Company Genworth Life Insurance Company of New York Genworth Life and Annuity Insurance Company Great West Life and Annuity Insurance Company Hartford Life Insurance Company
Integrity Life Insurance Company
John Hancock Life Insurance companies
Kemper Investors Life Insurance Company
Lincoln Benefit Life Insurance Company
Lincoln Life & Annuity Company of New York Lincoln National Life Insurance Company
Massachusetts Mutual Life Insurance Group MetLife Group
Minnesota Life Insurance
Company National Life Insurance Company
National Integrity Life Insurance Company Nationwide Group
New York Life Insurance and Annuity Corporation Phoenix Life Insurance Company
Protective Life Insurance
Provident Mutual Life Insurance
Prudential Insurance Company of America
Sun Life Group
Symetra Life Insurance Company
Transamerica Life Insurance Company
Union Central Life Insurance Company
United of Omaha Life Insurance Company
United Investors Life Insurance Company
Western Southern Life Assurance Company

Any additions, modifications or deletions to the financial advisors identified above that have occurred since the date hereof are not reflected.

The Advisor, the Distributor or their affiliates may enter into additional revenue sharing arrangements or change or discontinue existing arrangements with financial advisors at any time without notice.

The prospect of receiving, or the receipt of additional compensation or promotional incentives described above by financial advisors may provide such financial advisors and/or their salespersons with an incentive to favor sales of shares of the DWS funds or a particular DWS fund over sales of shares of mutual funds (or non-mutual fund investments) with respect to which the financial advisor does not receive additional compensation or promotional incentives, or receives lower levels of additional compensation or promotional incentives. Similarly, financial advisors may receive different compensation or incentives that may influence their recommendation of any particular share class of the Fund or of other funds. These payment arrangements, however, will not change the price that an investor pays for Fund shares or the amount that the Fund receives to invest on behalf of an investor and will not increase Fund expenses. You may wish to take such payment arrangements into account when considering and evaluating any recommendations relating to Fund shares and you should discuss this matter with your financial advisor and review your financial advisor's disclosures.

It is likely that broker-dealers that execute portfolio transactions for the Fund will include firms that also sell shares of the DWS funds to their customers. However, the Advisor will not consider sales of DWS fund shares as a factor in the selection of broker-dealers to execute portfolio transactions for the DWS funds. Accordingly, the Advisor has implemented policies and procedures reasonably designed to prevent its traders from considering sales of DWS fund shares as a factor in the selection of broker-dealers to execute portfolio transactions for the Fund. In addition, the Advisor, the Distributor and/or their affiliates will not use fund brokerage to pay for their obligation to provide additional compensation to financial advisors as described above.

Automatic Investment Plan. A shareholder may purchase shares of the Fund through an automatic investment program. With the Direct Deposit Purchase Plan ("Direct Deposit"), investments are made automatically (minimum $10,000 for Prime Reserve Class S shares and $25,000 for Premium Class S shares and maximum $250,000 for initial investments and a minimum of $50 and maximum $250,000 subsequent investments) from the shareholder's account at a bank, savings and loan or credit union into the shareholder's Fund account. Termination by a shareholder will become effective within thirty days after the DWS-SISC has received the request. The Fund may immediately terminate a shareholder's Direct Deposit in the event that any item is unpaid by the shareholder's financial institution.

Payroll Investment Plans. A shareholder may purchase shares through Payroll Direct Deposit or Government Direct Deposit. Under these programs, all or a portion of a shareholder's net pay or government check is invested each payment period. A shareholder may terminate participation in these programs by giving written notice to the shareholder's employer or government agency, as appropriate. (A reasonable time to act is required.) The Fund is not responsible for the efficiency of the employer or government agency making the payment or any financial institutions transmitting payments.

Expedited Purchase Procedures for Existing Shareholders. Shareholders of other DWS funds who have submitted an account application and have certified a tax identification number, clients having a regular investment counsel account with the Advisor or its affiliates and members of their immediate families, officers and employees of the Advisor or of any affiliated organization and their immediate families, members of the FINRA, and banks may open an account by wire by calling (800) 728-3337 for Prime Reserve Class S and Premium Class S shares and (800) 730-1313 for Institutional Shares and Managed Shares for instructions. The investor must send a duly completed and signed application to the Fund promptly. A subsequent purchase order for $10,000 or more that is not greater than four times an account value may be placed by telephone, etc. by established shareholders (except by DWS Scudder Individual Retirement Account (IRA), DWS Scudder Profit Sharing and DWS Money Purchase Pension Plans, DWS Scudder 401(k) and DWS Scudder 403(b) Plan holders), members of the FINRA, and banks.

Purchasing Shares -- Prime Reserve Class S, Premium Class S Shares, Managed Shares

The Fund has specific minimum initial investment requirements for each class of shares as follows:

Class of Shares Minimum Initial Investment Subsequent Minimum Investment
--------------- -------------------------- -----------------------------

Prime Reserve Class S $10,000 $50

Premium Class S $25,000 $50

Managed Shares $100,000 $1,000 (regular accounts)
 $100 (IRAs)
 $50 or more (Automatic Investment
 Plan)

The minimum investment requirements may be waived or lowered for investments effected through banks and other institutions that have entered into special arrangements with the Fund and for investments effected on a group basis by certain other entities and their employees, such as pursuant to a payroll deduction plan and for investments made in an Individual Retirement Account offered by the Fund. Investment minimums may also be waived for Trustees and officers of the Trust. The Fund, the Distributor and the Cash Products Group each reserve the right to reject any purchase order. The Fund will be invested in full and fractional shares. Reductions in value that result solely from market activity will not trigger an annual fee or involuntary redemption. Shareholders with a combined household account balance in any of the DWS Funds of $100,000 or more, as well as group retirement and certain other accounts will not be subject to a fee or automatic redemption.

Fiduciary (e.g., IRA or Roth IRA) and custodial accounts (e.g., UGMA or UTMA) with balances below $100 are subject to automatic redemption following 60 days' written notice to applicable shareholders.

The quarterly subminimum account policy applies to all accounts in a household. However, the fee will not apply to accounts enrolled in an automatic investment program, IRAs or employer-sponsored employee benefit plans using the subaccount record-keeping system made available through DWS-SISC.

Purchasing Shares -- Institutional Shares

The Fund has specific minimum initial investment requirements for Institutional Shares as follows:

Class of Shares Minimum Initial Investment Subsequent Minimum Investment
--------------- -------------------------- -----------------------------

Institutional Shares $1,000,000 None

Wire Transfer of Federal Funds

Orders for shares of the Fund will become effective when an investor's bank wire order or check is converted into federal funds (monies credited to the account of State Street Bank and Trust Company (the "Custodian") with its registered Federal Reserve Bank). If payment is transmitted by the Federal Reserve Wire System, the order will become effective upon receipt. Orders will be executed at 5:00 p.m. on the same day if a bank wire or check is converted to federal funds or a federal funds' wire is received by 5:00 p.m. In addition, if investors known to the Fund notify the Fund by 5:00 p.m. that they intend to wire federal funds to purchase shares of the Fund on any business day and if monies are received in time to be invested, orders will be executed at the net asset value per share determined at 5:00 p.m. the same day. Wire transmissions may, however, be subject to delays of several hours, in which event the effectiveness of the order will be delayed. Payments by a bank wire other than the Federal Reserve Wire System may take longer to be converted into federal funds. When payment for shares is by check drawn on any member of the Federal Reserve System, federal funds normally become available to the Fund on the business day after the check is deposited.

Purchase orders received between 4:00 p.m. and 5:00 p.m. Eastern time, for effectiveness at the 5:00 p.m. Eastern time net asset value determination, may be rejected based on certain guidelines. In particular, only investors known to the Fund may submit wire purchase orders between 4:00 p.m. and 5:00 p.m. Eastern time and acceptance of such an order will, among other things, be based upon the level of purchase orders received by the Fund, the size of the order submitted, general market conditions, and the availability of investments for the Fund.

Shares of the Fund may be purchased by writing or calling the Transfer Agent. Orders for shares of a particular class of the Fund will be executed at the net asset value per share of such class next determined after an order has become effective.

Checks drawn on a non-member bank may take substantially longer to be converted into federal funds and, accordingly, may delay the execution of an order. Checks must be payable in US dollars and will be accepted subject to collection at full face value. By investing in the Fund, a shareholder appoints the Transfer Agent to establish an open account to which all shares purchased will be credited, together with any dividends and capital gains distributions that are paid in additional shares.

Additional Information about Subsequent Investments by QuickBuy

Shareholders, whose predesignated bank account of record is a member of the Automated Clearing House Network (ACH) and who have elected to participate in the QuickBuy program may purchase shares of the Fund by telephone. Through this service shareholders may purchase up to $250,000. To purchase shares by QuickBuy, shareholders should call before the close of regular trading on The New York Stock Exchange, Inc. ("NYSE"), normally 4:00 p.m. Eastern time. Proceeds in the amount of your purchase will be transferred from your bank checking account two or three business days following your call. For requests received by the close of regular trading on the Exchange, shares will be purchased at the net asset value per share calculated at the close of trading on the day of your call. QuickBuy requests received after the close of regular trading on the Exchange will begin their processing and be purchased at the net asset value calculated the following business day. If you purchase shares by QuickBuy and redeem them within seven days of the purchase, the Fund may hold the redemption proceeds for a period of up to seven business days. If you purchase shares and there are insufficient funds in your bank account the purchase will be canceled and you will be subject to any losses or fees incurred in the transaction. QuickBuy transactions are not available for most retirement plan accounts. However, QuickBuy transactions are available for DWS Scudder IRA accounts.

In order to request purchases by QuickBuy, shareholders must have completed and returned to the Transfer Agent the application, including the designation of a bank account from which the purchase payment will be debited. New investors wishing to establish QuickBuy may so indicate on the application. Existing shareholders who wish to add QuickBuy to their account may do so by completing a QuickBuy Enrollment Form. After sending in an enrollment form, shareholders should allow 15 days for this service to be available.

The Fund employs procedures, including recording telephone calls, testing a caller's identity, and sending written confirmation of telephone transactions, designed to give reasonable assurance that instructions communicated by telephone are genuine, and to discourage fraud. To the extent that the Fund does not follow such procedures, it may be liable for losses due to unauthorized or fraudulent telephone instructions. The Fund will not be liable for acting upon instructions communicated by telephone that it reasonably believes to be genuine.

Other Information

The "Tax Identification Number" section of the Application must be completed when opening an account. Applications and purchase orders without a certified tax identification number and certain other certified information (e.g., from exempt organizations a certification of exempt status), will be returned to the investor. The Fund reserves the right, following 30 days' notice, to redeem all shares in accounts without a correct certified Social Security or tax identification number. A shareholder may avoid involuntary redemption by providing the Fund with a tax identification number during the 30-day notice period.

The Trust may issue shares at net asset value in connection with any merger or consolidation with, or acquisition of the assets of, any investment company or personal holding company, subject to the requirements of the 1940 Act.

Exchanges and Redemptions

Payment of redemption proceeds may be made in securities upon consent of a redeeming shareholder. The Trust may suspend or postpone redemptions with respect to the Fund as permitted pursuant to Section 22(e) of the Investment Company Act of 1940. Generally, those circumstances are when: 1) the New York Stock Exchange is closed other than customary weekend or holiday closings; 2) trading on the New York Stock Exchange is restricted; 3) an emergency exists which makes the disposal of securities owned by a portfolio or the fair determination of the value of a portfolio's net assets not reasonably practicable; or 4) the SEC, by order, permits the suspension of the right of redemption. Redemption payments by wire may also be delayed in the event of a nonroutine closure of the Federal Reserve wire payment system.

A shareholder's Fund account remains open for up to one year following complete redemption and all costs during the period will be borne by the Trust. This permits an investor to resume investments.

Exchanges

Exchanges are comprised of a redemption from one DWS fund and a purchase into another DWS fund. The exchange privilege is not applicable for Institutional Shares. The purchase side of the exchange either may be an additional investment into an existing account or may involve opening a new account in the other fund. When an exchange involves a new account, the new account will be established with the same registration, tax identification number, address, telephone redemption option, "DWS Automated Information Line" transaction authorization and dividend option as the existing account. Other features will not carry over automatically to the new account.

Class of Shares Minimum Exchange Amount
--------------- -----------------------

Prime Reserve Class S $50

Premium Class S $50

Managed Shares $1,000

Exchanges into other DWS Funds may have lower minimum exchange requirements. When an exchange represents an additional investment into an existing account, the account receiving the exchange proceeds must have identical registration, tax identification number, address, and account options/features as the account of origin. If the account receiving the exchange proceeds is to be different in any respect, the exchange request must be in writing and must contain an original signature guarantee.

Exchange orders received before the close of regular trading on the Exchange on any business day ordinarily will be executed at the respective net asset values determined on that day. Exchange orders received after the close of regular trading on the Exchange will be executed on the following business day.

Investors may also request, at no extra charge, to have exchanges automatically executed on a predetermined schedule from one DWS fund to an existing account in another DWS fund, at current net asset value, through DWS's Automatic Exchange Program. These exchanges must be for a minimum of $50. Shareholders may add this free feature over the telephone or in writing. Automatic exchanges will continue until the shareholder requests by telephone or in writing to have the feature removed, or until the originating account is depleted. The Trust and the Transfer Agent each reserves the right to suspend or terminate the privilege of the Automatic Exchange Program at any time.

There is no charge to the shareholder for any exchange described above. An exchange into another DWS fund is a redemption of shares, and therefore may result in tax consequences (gain or loss) to the shareholder and the proceeds of such exchange may be subject to backup withholding. (See "TAXES.")

Investors currently receive the exchange privilege, including exchange by telephone, automatically without having to elect it. The Fund employs procedures, including recording telephone calls, testing a caller's identity, and sending written confirmation of telephone transactions, designed to give reasonable assurance that instructions communicated by telephone are genuine, and to discourage fraud. To the extent that the Fund does not follow such procedures, it may be liable for losses due to unauthorized or fraudulent telephone instructions. The Fund will not be liable for acting upon instructions communicated by telephone that it reasonably believes to be genuine. The Fund and the Transfer Agent each reserves the right to suspend or terminate the privilege of exchanging by telephone at any time.

Before making an exchange, shareholders should obtain from DWS-SDI a prospectus of the DWS fund into which the exchange is being contemplated. The exchange privilege may not be available for certain DWS funds or classes of DWS Funds. For more information, please call (800) 728-3337 for Prime Reserve Class S or Premium Class S and (800) 730-1313 for Managed Shares. DWS retirement plans may have different exchange requirements. Please refer to appropriate plan literature.

Redemption by Telephone

(a) In order to request redemptions by telephone, shareholders must have completed and returned to the Transfer Agent the application, including the designation of a bank account to which the redemption proceeds are to be sent. Shareholders currently receive the right to redeem up to $100,000, unlimited for Institutional Shares, to their address of record automatically, without having to elect it. Shareholders may also request to have the proceeds mailed or wired to their pre-designated bank account. NEW INVESTORS wishing to establish the telephone redemption privilege must complete the appropriate section on the application.

(b) EXISTING SHAREHOLDERS (except those who are DWS Scudder IRA, DWS Scudder pension and profit-sharing, DWS Scudder 401(k) and DWS Scudder 403(b) Planholders) who wish to establish telephone redemption to a pre-designated bank account or who want to change the bank account previously designated to receive redemption proceeds should either return a Telephone Redemption Option Form (available upon request) or send a letter identifying the account and specifying the exact information to be changed. The letter must be signed exactly as the shareholder's name(s) appears on the account. An original signature and an original signature guarantee are required for each person in whose name the account is registered.

Telephone redemption is not available with respect to shares represented by share certificates or shares held in certain retirement accounts.

If a request for redemption to a shareholder's bank account is made by telephone, payment will be by Federal Reserve bank wire to the bank account designated on the application, unless a request is made that the redemption check be mailed to the designated bank account.

Note: Investors designating a savings bank to receive their telephone redemption proceeds are advised that if the savings bank is not a participant in the Federal Reserve System, redemption proceeds must be wired through a commercial bank which is a correspondent of the savings bank. As this may delay receipt by the shareholder's account, it is suggested that investors wishing to use a savings bank discuss wire procedures with their bank and submit any special wire transfer information with the telephone redemption authorization. If appropriate wire information is not supplied, redemption proceeds will be mailed to the designated bank.

Redemption requests by telephone (technically a repurchase by agreement between the Fund and the shareholder) of shares purchased by check will not be accepted until the purchase check has cleared which may take up to seven business days.

Redemption by QuickSell

Shareholders whose predesignated bank account of record is a member of the Automated Clearing House Network (ACH) and who have elected to participate in the QuickSell program may sell shares of the Fund by telephone. Redemptions must be for at least $50 and a maximum of $250,000. Proceeds in the amount of your redemption will be transferred to your bank checking account two or three business days following your call. For requests received by the close of regular trading on the Exchange, normally 4:00 p.m. Eastern time, shares will be redeemed at the net asset value per share calculated at the close of trading on the day of your call. QuickSell requests received after the close of regular trading on the Exchange will begin their processing and be redeemed at the net asset value calculated the following business day. QuickSell transactions are not available for DWS Scudder IRA accounts and most other retirement plan accounts.

In order to request redemptions by QuickSell, shareholders must have completed and returned to the Transfer Agent the application, including the designation of a bank account to which redemption proceeds will be credited. New investors wishing to establish QuickSell may so indicate on the application. Existing shareholders who wish to add QuickSell to their account may do so by completing a QuickSell Enrollment Form. After sending in an enrollment form, shareholders should allow 15 days for this service to be available.

Redemption by Mail

Any existing share certificates representing shares being redeemed must accompany a request for redemption and be duly endorsed or accompanied by a proper stock assignment form with signatures guaranteed.

In order to ensure proper authorization before redeeming shares, the Transfer Agent may request additional documents such as, but not restricted to, stock powers, trust instruments, certificates of death, appointments as executor, certificates of corporate authority and waivers of tax (required in some states when settling estates).

It is suggested that shareholders holding share certificates or shares registered in other than individual names contact the Transfer Agent prior to any redemptions to ensure that all necessary documents accompany the request. When shares are held in the name of a corporation, trust, fiduciary agent, attorney or partnership, the Transfer Agent requires, in addition to the stock power, certified evidence of authority to sign. These procedures are for the protection of shareholders and should be followed to ensure prompt payment. Redemption requests must not be conditional as to date or price of the redemption. Proceeds of a redemption will be sent within one business day of when your order is processed.

The requirements for IRA redemptions are different from those for regular accounts. For more information call (800) 728-3337 for Prime Reserve Class S and Premium Class S and (800) 730-1313 for Managed Shares.

Redemption by Checkwriting

All new investors and existing shareholders who apply to UMB Bank for checks may use them to pay any person, provided that each check is for at least $1,000 and not more than $5 million. By using the checks, the shareholder will receive daily dividend credit on his or her shares until the check has cleared the banking system. Investors who purchased shares by check may write checks against those shares only after they have been on the Fund's book for seven business days. Shareholders who use this service may also use other redemption procedures. No shareholder may write checks against certificated shares. The Fund pays the bank charges for this service. However, the Fund will review the cost of operation periodically and reserve the right to determine if direct charges to the persons who avail themselves of this service would be appropriate. The Fund, DWS-SISC and UMB Bank reserve the right at any time to suspend or terminate the Checkwriting procedure.

Premium Class S Shares, Prime Reserve Class S Shares and Managed Shares of the Fund accept Automated Clearing House ("ACH") debit entries for accounts that have elected the checkwriting redemption privilege. An example of an ACH debit is a transaction in which you have given your insurance company, mortgage company, credit card company, utility company, health club, etc., the right to withdraw your monthly payment from your fund account or the right to convert your mailed check into an ACH debit. Sometimes, you may give a merchant from whom you wish to purchase goods the right to convert your check to an ACH debit. You may also authorize a third party to initiate an individual payment in a specific amount from your account by providing your account information and authorization to such third party via the Internet or telephone. You authorize the fund upon receipt of an ACH debit entry referencing your account number, to redeem fund shares in your account to pay the entry to the third party originating the debit. The fund will make the payment on the basis of the account number that you provide to your merchant and will not compare this account number with the name on the account. The fund, the fund's transfer agent, the Shareholder Service Agent or any other person or system handling the transaction is not required to determine if there is a discrepancy between the name and the account number shown on the transfer instructions.

The payment of any ACH debit entry will be subject to sufficient funds being available in the designated account; the fund will not be able to honor an ACH debit entry if sufficient funds are not available. ACH debit entry transactions to your fund account should not be initiated or authorized by you in amounts exceeding the value of the shares of the fund then in the account and available for redemption. The fund may refuse to honor ACH debit entry transactions whenever the right of redemption has been suspended or postponed, or whenever the account is otherwise impaired. Your fund account statement will show any ACH debit entries in your account; you will not receive any other separate notice. (Merchants are permitted to convert your checks into ACH debits only with your prior consent.)

You may authorize payment of a specific amount to be made from your account directly by the fund to third parties on a continuing periodic basis. To arrange for this service, you should contact the person or company you will be paying. Any preauthorized transfers will be subject to sufficient funds being available in the designated account. A preauthorized transfer will continue to be made from the account in the same amount and frequency as initially established until you terminate the preauthorized transfer instructions with the person or company whom you have been paying. If regular preauthorized payments vary in amount, the person or company you are going to pay should tell you ten (10) days before each payment will be made and how much the payment will be.

If you wish to terminate the periodic preauthorized transfers, you should do so with the person or company to whom you have been making payments. If you have told the fund in advance to make regular payments out of your account, you may stop any of these payments by writing or calling the Shareholder Service Agent at the address and telephone number listed in the next paragraph in time for the Shareholder Service Agent to receive your request three (3) business days or more before the payment is scheduled to be made. If you call, the fund may also require that you put your request in writing so that the fund will receive it within 14 days after you call. If you order the fund to stop one of these payments three (3) business days or more before the transfer is scheduled and the fund does not do so, the fund will be liable for your loss or damages but not in an amount exceeding the amount of the payment. A stop payment order will stop only the designated periodic payment.

In case of errors or questions about your ACH debit entry transactions please telephone ((800) 728-3337 for Prime Reserve Class S and Premium Class S or (800) 730-1313 for Managed Shares) or write (DWS Scudder Investments Service Company, P.O. Box 219669, Kansas City, MO 64121-9669) the Shareholder Service Agent as soon as possible if you think your statement is wrong or shows an improper transfer or if you need more information about a transfer listed on the statement. Our business days are Monday through Friday except holidays. The Shareholder Service Agent must hear from you no later than 60 days after the fund sent you the first fund account statement on which the problem or error appeared. If you do not notify the Shareholder Service Agent within sixty (60) days after the fund sends you the account statement, you may not get back any money you have lost, and you may not get back any additional money you lose after the sixty (60) days if the fund or Shareholder Service Agent could have stopped someone from taking that money if you had notified the Shareholder Service Agent in time.

When you report a suspected transaction, we will need your name and account number, a description of the error or the transfer you are unsure about, an explanation as to why you believe it is an error or why you need more information and the dollar amount of the suspected error. If you tell the Shareholder Service Agent orally, the Shareholder Service Agent may require that you send your complaint or questions in writing within ten (10) business days. The Shareholder Service Agent will determine whether an error occurred within ten (10) business days after it hears from you and will correct any error promptly. If the Shareholder Service Agent needs more time, however, it may take up to 45 days (90 days for certain types of transactions) to investigate your complaint or question. If the Shareholder Service Agent decides to do this, your account will be credited with escrowed fund shares within ten (10) business days for the amount you think is in error so that you will have the use of the money during the time it takes the Shareholder Service Agent to complete its investigation. If the Shareholder Service Agent asks you to put your complaint or questions in writing and the Shareholder Service Agent does not receive it within ten (10) business days, your account may not be credited. The Shareholder Service Agent will tell you the results within three (3) business days after completing its investigation. If the Shareholder Service Agent determines that there was no error, the Shareholder Service Agent will send you a written explanation. You may ask for copies of documents that were used by the Shareholder Service Agent in the investigation.

In the event the fund, the fund's named transfer agent or the Shareholder Service Agent does not complete a transfer from your account on time or in the correct amount according to the fund's agreement with you, the fund may be liable for your losses or damages. The fund will not be liable to you if (i) there are not sufficient funds available in your account to complete the transfer, (ii) circumstances beyond our control (such as fire or flood or malfunction of equipment) prevent the transfer, (iii) you or another shareholder have supplied a merchant with incorrect account information, or (iv) a merchant has incorrectly formulated an ACH debit entry. In any case, the fund's liability shall not exceed the amount of the transfer in question.

The fund, the fund's named transfer agent or the Shareholder Service Agent will disclose information to third parties about your account or the transfers you make: (1) where it is necessary for completing the transfers, (2) in order to verify the existence or condition of your account for a third party such as a credit bureau or a merchant, (3) in order to comply with government agencies or court orders or (4) if you have given the fund written permission.

The acceptance and processing of ACH debit entry transactions is established solely for your convenience and the fund reserves the right to suspend, terminate or modify your ability to redeem fund shares by ACH debit entry transactions at any time. ACH debit entry transactions are governed by the National Automated Clearing House Association ("NACHA") Operating Rules and any local ACH operating rules then in effect, as well as Regulation E of the Federal Reserve Board.

Redemption-in-Kind

If conditions exist which make cash payments undesirable, upon consent of a redeeming shareholder, the Trust may honor any request for redemption or repurchase order by making payment in whole or in part in readily marketable securities chosen by the Fund and valued as they are for purposes of computing the Fund's net asset value (a redemption-in-kind). If payment is made in securities, a shareholder may incur transaction expenses in converting these securities into cash. The Trust has elected to be governed by Rule 18f-1 under the 1940 Act as a result of which the Fund is obligated to redeem shares, with respect to any one shareholder during any 90 day period, solely in cash up to the lesser of $250,000 or 1% of the net asset value of that Fund at the beginning of the period.

Expedited Redemption Service

In order to request the Expedited Redemption Service for Institutional Shares, shareholders must have completed and returned to the Transfer Agent the application electing this option. Redemption of shares may be requested by calling (800) 730-1313. Expedited Redemption Service orders that arrive before 12 noon Eastern time will be processed that day, and, if possible, those arriving between noon and 4:00 p.m. will be processed that day as well. Expedited Redemption Service is not available between 4:00 p.m. and 5:00 p.m., but redemptions by other available means may be made until 5:00 p.m. Eastern time.

Redemption by Wire

Shareholders may request to have redemption proceeds wired to their pre-designated bank account. If a request for redemption to a shareholder's bank account is made by telephone, payment will be by Federal Reserve bank wire to the bank account designated on the application, unless a request is made that the redemption check be mailed to the designated bank account. The Institutional Shares do not charge a wire fee.

Automatic Withdrawal Plan

Non-retirement plan shareholders may establish an Automatic Withdrawal Plan to receive monthly, quarterly or periodic redemptions from his or her account for any designated amount of $50 or more. Shareholders may designate which day they want the automatic withdrawal to be processed. The check amounts may be based on the redemption of a fixed dollar amount, fixed share amount, percent of account value or declining balance. The Plan provides for income dividends and capital gains distributions, if any, to be reinvested in additional shares. Shares are then liquidated as necessary to provide for withdrawal payments. Since the withdrawals are in amounts selected by the investor and have no relationship to yield or income, payments received cannot be considered as yield or income on the investment and the resulting liquidations may deplete or possibly extinguish the initial investment and any reinvested dividends and capital gains distributions. Requests for increases in withdrawal amounts or to change the payee must be submitted in writing, signed exactly as the account is registered, and contain signature guarantee(s). Any such requests must be received by the Fund's Transfer Agent ten days prior to the date of the first automatic withdrawal. An Automatic Withdrawal Plan may be terminated at any time by the shareholder, the Trust or its agent on written notice, and will be terminated when all shares of the Fund under the Plan have been liquidated or upon receipt by the Trust of notice of death of the shareholder.

The minimum account balance required to establish an automatic withdrawal plan on regular accounts is $5,000. An Automatic Withdrawal Plan request form can be obtained by calling (800) 728-3337 for Premium Class S shares and Prime Reserve Class S shares.

DIVIDENDS

Dividends and Capital Gains Distribution Options -- Premium Class S, Prime Reserve Class S and Managed Shares

Investors have freedom to choose whether to receive cash or to reinvest any dividends from net investment income or distributions from realized capital gains in additional shares of the Fund. For retirement plans, reinvestment is the only option. A change of instructions for the method of payment must be received by the Transfer Agent at least five days prior to a dividend record date. Shareholders also may change their dividend option either by calling (800) 728-3337 for Premium Class S shares and Prime Reserve Class S shares and (800) 730-1313 for Managed Shares or by sending written instructions to the Transfer Agent. Dividends and other distributions of the Fund in the aggregate amount of $10 or less are automatically reinvested in shares of the Fund unless the shareholder requests in writing that such policy not be applied to the shareholder's account. Please include your account number with your written request.

Reinvestment is usually made at the closing net asset value determined on the business day following the record date. Investors may leave standing instructions with the Transfer Agent designating their option for either reinvestment or cash distribution of any income dividends or capital gains distributions. If no election is made, dividends and distributions will be invested in additional shares of the same class of the Fund.

Investors choosing to participate in DWS Scudder's Automatic Withdrawal Plan must reinvest any dividends or capital gains. For most retirement plan accounts, the reinvestment of dividends and capital gains is also required.

Transaction Summaries

Annual summaries of all transactions in each Fund account are available to shareholders. The summaries may be obtained by calling (800) 728-3337 for Premium Class S Shares, Prime Reserve Class S Shares or (800) 730-1313 for Institutional and Managed Shares.

TAXES

The following discussion of US federal income tax consequences of investment in the Fund is based on the Internal Revenue Code of 1986, as amended ("the Code"), US Treasury regulations, and other applicable authority, as of the date of this SAI. These authorities are subject to change by legislative or administrative action, possibly with retroactive effect. The following discussion is only a summary of some of the important US federal tax considerations generally applicable to investments in the Fund. There may be other tax considerations applicable to particular shareholders. Shareholders should consult their own tax advisors regarding their particular situation and the possible application of foreign, state and local tax laws.

Special tax rules apply to investments through defined contribution plans and other tax-qualified plans. Shareholders should consult their tax advisers to determine the suitability of shares of the Fund as an investment through such plans and the precise effect of an investment on their particular tax situation.

Taxation of the Fund. The Fund intends to elect to be treated and to qualify each year as a regulated investment company under Subchapter M of the Code. In order to qualify for the special tax treatment accorded regulated investment companies and their shareholders, the Fund must, among other things:

(a) derive at least 90% of its gross income for each taxable year from (i) dividends, interest, payments with respect to certain securities loans, and gains from the sale or other disposition of stock, securities or foreign currencies, or other income (including but not limited to gains from options, futures, or forward contracts) derived with respect to its business of investing in such stock, securities, or currencies and (ii) net income derived from interests in "qualified publicly traded partnerships" (as defined below);

(b) diversify its holdings so that, at the end of each quarter of the Fund's taxable year, (i) at least 50% of the maret value of the Fund's total assets is represented by cash and cash items, US Government securities, securities of other regulated investment companies, and other securities limited in respect of any one issuer to a value not greater than 5% of the value of the Fund's total assets and not more than 10% of the outstanding voting securities of such issuer, and (ii) not more than 25% of the value of the Fund's total assets is invested (x) in the securities (other than those of the US Government or other regulated investment companies) of any one issuer or of two or more issuers which the Fund controls and which are engaged in the same, similar, or related trades or businesses, or (y) in the securities of one or more qualified publicly traded partnerships (as defined below); and

(c) distribute with respect to each taxable year at least 90% of the sum of its investment company taxable income (as that term is defined in the Code without regard to the deduction for dividends paid -- generally, taxable ordinary income and the excess, if any, of net short-term capital gains over net long-term capital losses) and net tax-exempt interest income, for such year.

The Fund will be deemed to own its proportionate share of the Portfolio's assets and to earn its proportionate share of the Portfolio's income for purposes of determining whether the Fund satisfies the requirements described above.

In general, for purposes of the 90% gross income requirement described in paragraph (a) above, income derived from a partnership will be treated as qualifying income only to the extent such income is attributable to items of income of the partnership which would be qualifying income if realized by the regulated investment company. However, recent legislation provides that 100% of the net income derived from an interest in a "qualified publicly traded partnership" (defined as a partnership (x) interests in which are traded on an established securities market or readily tradable on a secondary market or the substantial equivalent thereof and (y) that derives at least 90% of its income from the passive income sources defined in Code section 7704(d), and (z) that derives less than 90% of its income from the qualifying income described in paragraph (a)(i) above) will be treated as qualifying income. In addition, although in general the passive loss rules of the Code do not apply to regulated investment companies, such rules do apply to a regulated investment company with respect to items attributable to an interest in a qualified publicly traded partnership. Finally, for purposes of paragraph (b) above, the term "outstanding voting securities of such issuer" will include the equity securities of a qualified publicly traded partnership.

If the Fund qualifies as a regulated investment company that is accorded special tax treatment, such Fund will not be subject to federal income tax on income distributed in a timely manner to its shareholder in the form of dividends (including Capital Gain Dividends, as defined below.

In determining its net capital gain for Capital Gain Dividend purposes, a regulated investment company generally must treat any net capital loss or any net long-term capital loss incurred after October 31 as if it had been incurred in the succeeding year. Treasury regulations permit a regulated investment company, in determining its taxable income, to elect to treat all or part of any net capital loss, any net long-term capital loss or any foreign currency loss incurred after October 31 as if it had been incurred in the succeeding year.

If for any taxable year the Fund does not qualify for the special federal income tax treatment afforded regulated investment companies, all of its taxable income will be subject to federal income tax at regular corporate rates (without any deduction for distributions to its shareholders), and all distributions from earnings and profits, including any distributions of net tax-exempt income and net long-term capital gains, will be taxable to shareholders as ordinary income. Such distributions however would generally be eligible (i) to be treated as "qualified dividend income" in the case of individual and other noncorporate shareholders, and (ii) for the 70% dividends received deduction in the case of corporate shareholders. In addition, the Fund could be required to recognize unrealized gains, pay substantial taxes and interest and make substantial distributions before requalifying as a regulated investment company that is accorded special tax treatment.

The Fund intends to distribute at least annually to its shareholders all or substantially all of its investment company taxable income (computed without regard to the dividends-paid deduction) and may distribute its net capital gain. Investment company taxable income (which is retained by the Fund) will be subject to tax at regular corporate rates. The Fund may also retain for investment its net capital gain. If the Fund retains any net capital gain, it will be subject to tax at regular corporate rates on the amount retained, but may designate the retained amount as undistributed capital gains in a notice to its shareholders who (i) will be required to include in income for federal income tax purposes, as long-term capital gain, their shares of such undistributed amount, and (ii) will be entitled to credit their proportionate shares of the tax paid by the Fund on such undistributed amount against their federal income tax liabilities, if any, and to claim refunds on a properly-filed US tax return to the extent the credit exceeds such liabilities. For federal income tax purposes, the tax basis of shares owned by a shareholder of the Fund will be increased by an amount equal under current law to the difference between the amount of undistributed capital gains included in the shareholder's gross income and the tax deemed paid by the shareholder under clause (ii) of the preceding sentence.

The Fund is subject to a nondeductible 4% excise tax on amounts required to be but not distributed under a prescribed formula. The formula requires payment to shareholders during a calendar year of distributions representing at least 98% of the Fund's ordinary income for the calendar year and at least 98% of the excess of its capital gains over capital losses realized during the one-year period ending October 31 (in most cases) of such year as well as amounts that were neither distributed nor taxed to the Fund during any prior calendar year. A dividend paid to shareholders in January of a year generally is deemed to have been paid by the Fund on December 31 of the preceding year, if the dividend was declared and payable to shareholders of record on a date in October, November or December of that preceding year. Although the Fund's distribution policies should enable it to avoid excise tax liability, the Fund may retain (and be subject to income and excise tax on) a portion of its capital gains or other income if it appears to be in the interest of such Fund.

Taxation of Fund Distributions.

Dividends and distributions on the Fund's shares are generally subject to federal income tax as described herein to the extent they do not exceed the Fund's realized income and gains, even though such dividends and distributions may economically represent a return of a particular shareholder's investment. Such distributions are likely to occur in respect of shares purchased at a time when the Fund's net asset value reflects gains that are either unrealized, or realized but not distributed. Such realized gains may be required to be distributed even when the Fund's net asset value also reflects unrealized losses.

For federal income tax purposes, distributions of investment income are generally taxable as ordinary income. Taxes on distributions of capital gains are determined by how long the Fund owned the investments that generated them, rather than how long a shareholder has owned his or her shares. Distributions of net capital gains from the sale of investments that the Fund owned for more than one year and that are properly designated by the Fund as capital gain dividends ("Capital Gain Dividends") will be taxable as ordinary income Distributions are taxable whether shareholders receive them in cash or reinvest them in additional shares through the reinvestment privilege.

Long-term capital gain rates applicable to individuals have been temporarily reduced -- in general, to 15% with lower rates applying to taxpayers in the 10% and 15% rate brackets -- for taxable years beginning before January 1, 2011. The Fund does not expect to make any distributions that qualify as qualified dividend income.

If the Fund makes a distribution to a shareholder in excess of the Fund's current and accumulated earnings and profits in any taxable year, the excess distribution will be treated as a return of capital to the extent of such shareholder's tax basis in its shares, and thereafter as capital gain. A return of capital is not taxable, but it reduces a shareholder's tax basis in its shares, thus reducing any loss or increasing any gain on a subsequent taxable disposition by the shareholder of its shares.

Taxation of Fund Investments. Because the Fund invests all of its assets in shares of the Portfolio, which is taxed as a regulated investment company, its distributable income and gains will normally consist of distributions from the Portfolio and gains and losses on the disposition of shares of the Portfolio. To the extent that the Portfolio realizes net losses on its investments for a given taxable year, the Fund will not be able to recognize its share of those losses (so as to offset distributions of net income or capital gains from other underlying funds) until it disposes of shares of the Portfolio. Moreover, even when the Fund does make such a disposition, a portion of its loss may be recognized as a long-term capital loss, which will not be treated as favorably for federal income tax purposes as a short-term capital loss or an ordinary deduction. In particular, the Fund will not be able to offset any capital losses from its dispositions of Portfolio shares against its ordinary income (including distributions of any net short-term capital gains realized by the Portfolio).

In addition, in certain circumstances, the "wash sale" rules under Section 1091 of the Code may apply to the Fund's sales of the Portfolio's shares that have generated losses. A wash sale occurs if the Portfolio's shares are sold by the Fund at a loss and the Fund acquires additional Portfolio shares 30 days before or after the date of the sale. The wash-sale rules could defer loses in the Fund's hands on sales of Portfolio shares (to the extent such sales are wash sales) for extended (and, in certain cases, potentially indefinite) periods of time.

As a result of the foregoing rules, and certain other special rules, it is possible that the amounts of net investment income and net capital gains that the Fund will be required to distribute to shareholders will be greater than such amounts would have been had the Fund invested directly in the securities held by the Portfolio, rather than investing in shares of the Portfolio. For similar reasons, the character of distributions from the Fund (e.g., long-term capital gain, exempt interest, eligibility for dividends-received deduction, etc.) will not necessarily be the same as it would have been had the Fund invested directly in the securities held by the Portfolio.

Depending on the Fund's percentage ownership in the Portfolio both before and after a redemption of Portfolio shares, the Fund's redemption of shares of the Portfolio may cause the Fund to be treated as receiving a dividend taxable as ordinary income on the full amount of the distribution instead of receiving capital gain income on the shares of the Portfolio. This would be the case where the Fund holds a significant interest in the Portfolio and redeems only a small portion of such interest.

Transactions in Fund Shares. The sale, exchange or redemption of shares of the Fund may give rise to a gain or loss. In general, any gain or loss realized upon a taxable disposition of shares will be treated as long-term capital gain or loss if the shares have been held for more than 12 months. Otherwise, the gain or loss on the taxable disposition of shares of the Fund will be treated as short-term capital gain or loss. However, any loss realized upon a taxable disposition of shares held for six months or less will be treated as long-term, rather than short-term, to the extent of any long-term capital gain distributions received (or deemed received) by the shareholder with respect to the shares. All or a portion of any loss realized upon a taxable disposition of shares of the Fund will be disallowed if other substantially identical shares of a Fund are purchased within 30 days before or after the disposition. In such a case, the basis of the newly purchased shares will be adjusted to reflect the disallowed loss. Because the Fund seeks to maintain a stable share price, you are unlikely to have capital gains or losses when you sell Fund shares.

Under Treasury regulations, if a shareholder recognizes a loss of $2 million or more for an individual shareholder or $10 million or more for a corporate shareholder, the shareholder must file with the Internal Revenue Service ("IRS") a disclosure statement on Form 8886. Direct shareholders of portfolio securities are in many cases excepted from this reporting requirement, but under current guidance, shareholders of a regulated investment company are not excepted. Future guidance may extend the current exception from this reporting requirement to shareholders of most or all regulated investment companies. The fact that a loss is reportable under these regulations does not affect the legal determination of whether the taxpayer's treatment of the loss is proper. Shareholders should consult their tax advisers to determine the applicability of these regulations in light of their individual circumstances.

In some cases, shareholders will not be permitted to take all or a portion of their sales loads into account for purposes of determining the amount of gain or loss realized on the disposition of their shares. This prohibition generally applies where (1) the shareholder incurs a sales load in acquiring the shares of the Fund, (2) the shares are disposed of before the 91st day after the date on which they were acquired, and (3) the shareholder subsequently acquires shares in the Fund or another regulated investment company and the otherwise applicable sales charge is reduced under a "reinvestment right" received upon the initial purchase of Fund shares. The term " reinvestment right" means any right to acquire shares of one or more regulated investment companies without the payment of a sales load or with the payment of a reduced sales charge. Sales charges affected by this rule are treated as if they were incurred with respect to the shares acquired under the reinvestment right. This provision may be applied to successive acquisitions of Fund shares.

Withholding and Other Tax Considerations. Under the backup withholding provisions of the Code, redemption proceeds as well as distributions may be subject to federal income tax withholding for certain shareholders, including those who fail to furnish a Fund with their taxpayer identification numbers and certifications as to their tax status, who have underreported dividend or interest income, or who fail to certify to the Fund that they are not subject to such withholding.

Non-US Shareholders. Distributions properly designated Capital Gain Dividends generally will not be subject to withholding of federal income tax. In general, dividends (other than Capital Gain Dividends) paid by the Fund to a shareholder that is not a "US person" within the meaning of the Code (a "foreign person") are subject to withholding of US federal income tax at a rate of 30% (or lower applicable treaty rate) even if they are funded by income or gains (such as portfolio interest, short-term capital gains, or foreign-source dividend and interest income) that, if paid to a foreign person directly, would not be subject to withholding. However, effective for taxable years of the Fund beginning before January 1, 2008, the Fund was not required to withhold any amounts (i) with respect to distributions (other than distributions to a foreign person (w) that has not provided a satisfactory statement that the beneficial owner is not a US person, (x) to the extent that the dividend is attributable to certain interest on an obligation if the foreign person is the issuer or is a 10% shareholder of the issuer, (y) that is within certain foreign countries that have inadequate information exchange with the United States, or (z) to the extent the dividend is attributable to interest paid by a person that is a related person of the foreign person and the foreign person is a controlled foreign corporation) from US source interest income that would not be subject to US federal income tax if earned directly by an individual foreign person, to the extent such distributions are properly designated by the Fund, and (ii) with respect to distributions (other than distributions to an individual foreign person who is present in the United States for a period or periods aggregating 183 days or more during the year of the distribution) of net short-term capital gains in excess of net long-term capital losses, to the extent such distributions are properly designated by the Fund. Depending on the circumstances, the Fund may make such designations with respect to all, some or none of its potentially eligible dividends and/or treat such dividends, in whole or in part, as ineligible for this exemption from withholding. Pending legislation would extend the exemption from withholding for interest-related and short-term capital gain distributions for one year, i.e. for taxable years beginning before January 1, 2009. At the time of this filing, it is unclear whether the legislation will be enacted.

In order to qualify for this exemption from withholding, a foreign person will need to comply with applicable certification requirements relating to its non-US status (including, in general, furnishing an IRS Form W-8BEN or substitute form). In the case of shares held through an intermediary, the intermediary may withhold even if the Fund makes a designation with respect to a payment. Foreign persons should consult their intermediaries with respect to the application of these rules to their account.

A beneficial holder of shares who is a foreign person is not, in general, subject to US federal income tax on gains (and is not allowed a deduction for losses) realized on the sale of shares of the Fund or on Capital Gain Dividends unless (i) such gain or dividend is effectively connected with the conduct of a trade or business carried on by such holder within the United States or (ii) in the case of an individual holder, the holder is present in the United States for a period or periods aggregating 183 days or more during the year of the sale or the receipt of the Capital Gain Dividend and certain other conditions are met.

In order for a foreign investor to qualify for exemption from the backup withholding tax rates under income tax treaties, the foreign investor must comply with special certification and filing requirements. Foreign investors in the Fund should consult their tax advisers in this regard. Backup withholding is not an additional tax. Any amounts withheld may be credited against the shareholder's US federal income tax liability, provided the appropriate information is furnished to the IRS.

If a shareholder is eligible for the benefits of a tax treaty, any effectively connected income or gain will generally be subject to US federal income tax on a net basis only if it is also attributable to a permanent establishment maintained by the shareholder in the United States.

A beneficial holder of shares who is a foreign person may be subject to state and local tax and to the US federal estate tax in addition to the federal tax on income referred to above.

General Considerations. The federal income tax discussion set forth above is for general information only. Investors are advised to consult their own tax advisors with respect to their own circumstances of the above-described general federal income taxation rules and with respect to other federal, state, local or foreign tax consequences to them of an investment in shares of the Fund.

NET ASSET VALUE

The Portfolio values its portfolio instruments at amortized cost, which does not take into account unrealized capital gains or losses. This involves initially valuing an instrument at its cost and thereafter assuming a constant amortization to maturity of any discount or premium, regardless of the impact of fluctuating interest rates on the market value of the instrument. While this method provides certainty in valuation, it may result in periods during which value, as determined by amortized cost, is higher or lower than the price the Portfolio would receive if it sold the instrument. Calculations are made to compare the value of the Portfolio's investments valued at amortized cost with market values. Market valuations are obtained by using actual quotations provided by market makers, estimates of market value, or values obtained from yield data relating to classes of money market instruments published by reputable sources at the mean between the bid and asked prices for the instruments. If a deviation of 1/2 of 1% or more were to occur between the net asset value per share calculated by reference to market values and the Portfolio's $1.00 per share net asset value, or if there were any other deviation that the Board of Trustees of the Portfolio believed would result in a material dilution to shareholders or purchasers, the Board of Trustees would promptly consider what action, if any, should be initiated. If the Portfolio's net asset value per share (computed using market values) declined, or were expected to decline, below $1.00 (computed using amortized cost), the Board of Trustees of the Portfolio might temporarily reduce or suspend dividend payments in an effort to maintain the net asset value at $1.00 per share. As a result of such reduction or suspension of dividends or other action by the Board of Trustees, an investor would receive less income during a given period than if such a reduction or suspension had not taken place. Such action could result in investors receiving no dividend for the period during which they hold their shares and receiving, upon redemption, a price per share lower than that which they paid. On the other hand, if the Portfolio's net asset value per share (computed using market values) were to increase, or were anticipated to increase above $1.00 (computed using amortized cost), the Board of Trustees of the Portfolio might supplement dividends in an effort to maintain the net asset value at $1.00 per share. Redemption orders received in connection with the administration of checkwriting programs by certain dealers or other financial services firms prior to the determination of the Portfolio's net asset value also may be processed on a confirmed basis in accordance with the procedures established by DWS-SDI.

Each investor in the Portfolio, including the Fund, may add to or reduce its investment in the Portfolio on each day the Portfolio determines its NAV. At the close of each such business day, the value of each investor's beneficial interest in the Portfolio will be determined by multiplying the NAV of the Portfolio by the percentage, effective for that day, which represents that investor's share of the aggregate beneficial interests in the Portfolio. Any additions or withdrawals, which are to be effected as of the close of business on that day, will then be effected. The investor's percentage of the aggregate beneficial interests in the Portfolio will then be recomputed as the percentage equal to the fraction (i) the numerator of which is the value of such investor's investment in the Portfolio as of the close of business on such day plus or minus, as the case may be, the amount of net additions to or withdrawals from the investor's investment in the Portfolio effected as of the close of business on such day, and (ii) the denominator of which is the aggregate NAV of the Portfolio as of the close of business on such day plus or minus, as the case may be, the amount of net additions to or withdrawals from the aggregate investments in the Portfolio by all investors in the Portfolio. The percentage so determined will then be applied to determine the value of the investor's interest in the Portfolio as of the close of the following business day.

TRUSTEES AND OFFICERS

The following table presents certain information regarding the Board Members of the Trust. Each Board Member's year of birth is set forth in parentheses after his or her name. Unless otherwise noted, (i) each Board Member has engaged in the principal occupation(s) noted in the table for at least the most recent five years, although not necessarily in the same capacity, and (ii) the address of each Board Member that is not an "interested person" (as defined in the 1940 Act) of the Trust or the Advisor (each, an "Independent Board Member") is c/o Dawn-Marie Driscoll, PO Box 100176, Cape Coral, FL 33904. The term of office for each Board Member is until the election and qualification of a successor, or until such Board Member sooner dies, resigns, is removed or as otherwise provided in the governing documents of the Trust. Because the Fund does not hold an annual meeting of shareholders, each Board Member will hold office for an indeterminate period. The Board Members may also serve in similar capacities with other funds in the DWS fund complex.

Independent Board Members

--------------------------------------------------------------------------------------------------------------------
 Name, Year of Birth, Position Number of Funds
 with the Trust and Length of Business Experience and in DWS Fund
 Time Served(1) Directorships During the Past 5 Years Complex Overseen
--------------------------------------------------------------------------------------------------------------------
Dawn-Marie Driscoll (1946) President, Driscoll Associates (consulting firm); Executive 135
Chairperson since 2004,(2) and Fellow, Center for Business Ethics, Bentley College;
Board Member since 1987 formerly: Partner, Palmer & Dodge (1988-1990); Vice President
 of Corporate Affairs and General Counsel, Filene's
 (1978-1988); Directorships: Trustee of 8 open-end mutual
 funds managed by Sun Capital Advisers, Inc. (since 2007);
 Director of ICI Mutual Insurance Company (since 2007);
 Advisory Board, Center for Business Ethics,
 Bentley College; Trustee, Southwest Florida
 Community Foundation (charitable
 organization); former Directorships:
 Investment Company Institute (audit,
 executive, nominating committees) and
 Independent Directors Council (governance,
 executive
 committees)
--------------------------------------------------------------------------------------------------------------------
Paul K. Freeman Consultant, World Bank/Inter-American Development Bank; 133
(1950) formerly: Project Leader, International Institute for Applied
Vice Chairperson since 2008, and Systems Analysis (1998-2001); Chief Executive Officer, The
Board Member since 1993 Eric Group, Inc. (environmental insurance) (1986-1998)
--------------------------------------------------------------------------------------------------------------------
John W. Ballantine (1946) Retired; formerly: Executive Vice President and Chief Risk 135
Board Member since 1999 Management Officer, First Chicago NBD Corporation/The First
 National Bank of Chicago (1996-1998); Executive Vice
 President and Head of International Banking (1995-1996);
 Directorships: Healthways Inc. (provider of disease and care
 management services); Portland General Electric (utility
 company); Stockwell Capital Investments PLC (private equity);
 former Directorships: First Oak Brook Bancshares, Inc. and
 Oak Brook Bank
--------------------------------------------------------------------------------------------------------------------
 Henry P. Becton, Jr. (1943) Vice Chair, WGBH Educational Foundation; Directorships: 135
 Board Member since Association of Public Television Stations; Becton Dickinson
 1990 and Company(3) (medical technology company); Belo
 Corporation(3) (media company); Boston Museum
 of Science; Public Radio International; former
 Directorships: American Public Television;
 Concord Academy; New England Aquarium; Mass.
 Corporation for Educational
 Telecommunications; Committee for Economic
 Development; Public Broadcasting Service
--------------------------------------------------------------------------------------------------------------------
Keith R. Fox (1954) Managing General Partner, Exeter Capital Partners (a series 135
Board Member since of private equity funds); Directorships: Progressive Holding
1996 Corporation (kitchen goods importer and distributor); Natural
 History, Inc. (magazine publisher); Box Top Media Inc.
 (advertising); The Kennel Shop (retailer)
--------------------------------------------------------------------------------------------------------------------
Kenneth C. Froewiss Clinical Professor of Finance, NYU Stern School of Business 135
(1945) (1997-present); Member, Finance Committee, Association for
Board Member since Asian Studies (2002-present); Director, Mitsui Sumitomo
2001 Insurance Group (US) (2004-present); prior thereto, Managing
 Director, J.P. Morgan (investment banking firm) (until 1996)
--------------------------------------------------------------------------------------------------------------------
Richard J. Herring Jacob Safra Professor of International Banking and Professor, 135
(1946) Finance Department, The Wharton School, University of
Board Member since Pennsylvania (since July 1972); Co-Director, Wharton
1990 Financial Institutions Center (since July 2000); Director,
 Japan Equity Fund, Inc. (since September 2007), Thai Capital
 Fund, Inc. (since September 2007), Singapore Fund, Inc.
 (since September 2007); formerly: Vice Dean and Director,
 Wharton Undergraduate Division (July 1995-June 2000);
 Director, Lauder Institute of International Management
 Studies (July 2000-June 2006)
--------------------------------------------------------------------------------------------------------------------
William McClayton (1944) Chief Administrative Officer, Diamond Management & Technology 135
Board Member since 2004 Consultants, Inc. (global management consulting firm)
 (2001-present); Directorship: Board of Managers, YMCA of
 Metropolitan Chicago; formerly: Senior Partner, Arthur
 Andersen LLP (accounting) (1966-2001); Trustee, Ravinia
 Festival
--------------------------------------------------------------------------------------------------------------------
Rebecca W. Rimel President and Chief Executive Officer, The Pew Charitable 135
(1951) Trusts (charitable organization) (1994 to present); Trustee,
Board Member since Thomas Jefferson Foundation (charitable organization) (1994
1995 to present); Trustee, Executive Committee, Philadelphia
 Chamber of Commerce (2001 to 2007); Trustee,
 Pro Publica (2007-present) (charitable
 organization); formerly: Executive Vice
 President, The Glenmede Trust Company
 (investment trust and wealth management) (1983
 to 2004); Board Member, Investor Education
 (charitable organization) (2004-2005);
 Director, Viasys Health Care(3) (January
 2007-June 2007)
--------------------------------------------------------------------------------------------------------------------
William N. Searcy, Jr. Private investor since October 2003; Trustee of 8 open-end 135
(1946) mutual funds managed by Sun Capital Advisers, Inc. (since
Board Member since October 1998); formerly: Pension & Savings Trust Officer,
1993 Sprint Corporation(3) (telecommunications) (November
 1989-September 2003)
--------------------------------------------------------------------------------------------------------------------
Jean Gleason Stromberg Retired; formerly: Consultant (1997-2001); Director, US 135
(1943) Government Accountability Office (1996-1997); Partner,
Board Member since Fulbright & Jaworski, L.L.P. (law firm) (1978-1996);
1997 Directorships: The William and Flora Hewlett Foundation;
 Service Source, Inc.; former Directorships: Mutual Fund
 Directors Forum (2002-2004), American Bar Retirement
 Association (funding vehicle for retirement plans) (1987-1990
 and 1994-1996)
--------------------------------------------------------------------------------------------------------------------
Robert H. Wadsworth (1940) President, Robert H. Wadsworth & Associates, Inc. (consulting 138
Board Member since 1999 firm) (1983 to present).
--------------------------------------------------------------------------------------------------------------------

Interested Board Member

--------------------------------------------------------------------------------------------------------------------
 Name, Year of Birth, Position Business Experience and Number of Funds
 with the Trust and Length of in DWS Fund
 Time Served(1) Directorships During the Past 5 Years Complex Overseen
--------------------------------------------------------------------------------------------------------------------
 Axel Schwarzer(4) Managing Director(5), Deutsche Asset Management; Head of 135
 (1958) Deutsche Asset Management Americas; CEO of DWS Scudder;
 Board Member since formerly: board member of DWS Investments, Germany
 2006 (1999-2005); Head of Sales and Product Management for the
 Retail and Private Banking Division of
 Deutsche Bank in Germany (1997-1999); various
 strategic and operational positions for
 Deutsche Bank Germany Retail and Private
 Banking Division in the field of investment
 funds, tax driven instruments and asset
 management for corporates (1989-1996)
--------------------------------------------------------------------------------------------------------------------

Officers(6)

--------------------------------------------------------------------------------------------------------------------
 Name, Year of Birth, Position Business Experience and
 with the Trust and Length of
 Time Served(7) Directorships During the Past 5 Years
--------------------------------------------------------------------------------------------------------------------
 Michael G. Clark(8) (1965) Managing Director(5), Deutsche Asset Management (2006-present); President of
 President, 2006-present DWS family of funds; Director, ICI Mutual Insurance Company (since
 October 2007); formerly: Director of Fund Board Relations (2004-2006) and
 Director of Product Development (2000-2004), Merrill Lynch Investment Managers;
 Senior Vice President Operations, Merrill Lynch Asset Management (1999-2000)
--------------------------------------------------------------------------------------------------------------------
 John Millette(9) (1962) Director(5), Deutsche Asset Management
 Vice President and Secretary,
 1999-present
--------------------------------------------------------------------------------------------------------------------
 Paul H. Schubert(8) (1963) Managing Director(5), Deutsche Asset Management (since July 2004); formerly:
 Chief Financial Officer, Executive Director, Head of Mutual Fund Services and Treasurer for UBS Family
 2004-present of Funds (1998-2004); Vice President and Director of Mutual Fund Finance at UBS
 Treasurer, 2005-present Global Asset Management (1994-1998)
--------------------------------------------------------------------------------------------------------------------
 Patricia DeFilippis(8) (1963) Vice President, Deutsche Asset Management (since June 2005); formerly: Counsel,
 Assistant Secretary, New York Life Investment Management LLC (2003-2005); legal associate, Lord,
 2005-present Abbett & Co. LLC (1998-2003)
--------------------------------------------------------------------------------------------------------------------
 Elisa D. Metzger(8) (1962) Director(5), Deutsche Asset Management (since September 2005); formerly:
 Assistant Secretary, Counsel, Morrison and Foerster LLP (1999-2005)
 2005-present
--------------------------------------------------------------------------------------------------------------------
 Caroline Pearson(9) (1962) Managing Director(5), Deutsche Asset Management
 Assistant Secretary,
 1997-present
--------------------------------------------------------------------------------------------------------------------
 Paul Antosca(9) Director(5), Deutsche Asset Management (since 2006); formerly: Vice President,
 (1957) The Manufacturers Life Insurance Company (U.S.A.) (1990-2006)
 Assistant Treasurer,
 2007-present
--------------------------------------------------------------------------------------------------------------------
 Jack Clark (9) Director(5), Deutsche Asset Management (since 2007); formerly: Vice President,
 (1967) State Street Corporation (2002-2007)
 Assistant Treasurer,
 2007-present
--------------------------------------------------------------------------------------------------------------------
 Kathleen Sullivan D'Eramo(9) Director(5), Deutsche Asset Management
 (1957)
 Assistant Treasurer,
 2003-present
--------------------------------------------------------------------------------------------------------------------
 Diane Kenneally(9) Director(5), Deutsche Asset Management
 (1966)
 Assistant Treasurer,
 2007-present
--------------------------------------------------------------------------------------------------------------------
 Jason Vazquez(8) (1972) Vice President, Deutsche Asset Management (since 2006); formerly: AML
 Anti-Money Laundering Operations Manager for Bear Stearns (2004-2006); Supervising Compliance
 Compliance Officer, Principal and Operations Manager for AXA Financial (1999-2004)
 2007-present
--------------------------------------------------------------------------------------------------------------------
 Robert Kloby(8) (1962) Managing Director(5), Deutsche Asset Management (2004-present); formerly: Chief
 Chief Compliance Officer, Compliance Officer/Chief Risk Officer, Robeco USA (2000-2004); Vice President,
 2006-present The Prudential Insurance Company of America (1988-2000); E.F. Hutton and
 Company (1984-1988)
--------------------------------------------------------------------------------------------------------------------
 J. Christopher Jackson(8) Director(5), Deutsche Asset Management (2006-present); formerly: Director,
 (1951) Chief Legal Officer, Senior Vice President, General Counsel, and Assistant Secretary, Hansberger Global
 2006-present Investors, Inc. (1996-2006); Director, National Society of Compliance
 Professionals (2002-2005) (2006-2009)
--------------------------------------------------------------------------------------------------------------------

(1) The length of time served represents the year in which the Board Member joined the board of one or more DWS funds currently overseen by the Board.

(2) Represents the year in which Ms. Driscoll was first appointed Chairperson of certain DWS funds.

(3) A publicly held company with securities registered pursuant to
Section 12 of the Securities Exchange Act of 1934.

(4) The mailing address of Axel Schwarzer is c/o Deutsche Investment Management Americas Inc., 345 Park Avenue, New York, New York 10154. Mr. Schwarzer is an interested Board Member by virtue of his positions with Deutsche Asset Management. As an interested person, Mr. Schwarzer receives no compensation from the Fund.

(5) Executive title, not a board directorship.

(6) As a result of their respective positions held with the Advisor, these individuals are considered "interested persons" of the Advisor within the meaning of the 1940 Act. Interested persons receive no compensation from the Fund.

(7) The length of time served represents the year in which the officer was first elected in such capacity for one or more DWS funds.

(8) Address: 345 Park Avenue, New York, New York 10154.

(9) Address: Two International Place, Boston, Massachusetts 02110.

Certain officers hold similar positions for other investment companies for which DIMA or an affiliate serves as the Advisor.

Officer's Role with Principal Underwriter: DWS Scudder Distributors, Inc.
------------------------------------------ ------------------------------

 Paul H. Schubert: Vice President
 Caroline Pearson: Secretary

Board Members' Responsibilities. The officers of the Trust manage its day-to-day operations under the direction of the Board. The primary responsibility of the Board is to represent the interests of the Fund and to provide oversight of the management of the Fund.

Board Committees. The Board has established the following standing committees:
Audit Committee, Nominating and Governance Committee, Contract Committee, Equity Oversight Committee, Fixed-Income and Quant Oversight Committee, Marketing and Shareholder Services Committee, and Operations Committee. For each committee, the Board has adopted a written charter setting forth each committee's responsibilities. Each committee was reconstituted effective April 1, 2008.

Audit Committee: The Audit Committee, which consists entirely of Independent Board Members, assists the Board in fulfilling its responsibility for oversight of (1) the integrity of the financial statements, (2) the Fund's accounting and financial reporting policies and procedures, (3) the Fund's compliance with legal and regulatory requirements related to accounting and financial reporting and (4) the qualifications, independence and performance of the independent registered public accounting firm for the Fund. It also approves and recommends to the Board the appointment, retention or termination of the independent registered public accounting firm for the Fund, reviews the scope of audit and internal controls, considers and reports to the Board on matters relating to the Fund's accounting and financial reporting practices, and performs such other tasks as the full Board deems necessary or appropriate. The Audit Committee receives annual representations from the independent registered public accounting firm as to its independence. The members of the Audit Committee are William McClayton (Chair), Kenneth C. Froewiss (Vice Chair), John W. Ballantine, Henry P. Becton, Jr., Keith R. Fox and William N. Searcy, Jr. During the calendar year 2007, the Audit Committee of the Fund's Board held nine (9) meetings.

Nominating and Governance Committee: The Nominating and Governance Committee, which consists entirely of Independent Board Members, recommends individuals for membership on the Board, nominates officers, board and committee chairs, vice chairs and committee members, and oversees the operations of the Board. The Nominating and Governance Committee also reviews recommendations by shareholders for candidates for Board positions. Shareholders may recommend candidates for Board positions by forwarding their correspondence by US mail or courier service to Dawn-Marie Driscoll, P.O. Box 100176, Cape Coral, FL 33904. The members of the Nominating and Governance Committee are Henry P. Becton, Jr. (Chair), Rebecca W. Rimel (Vice Chair), Paul K. Freeman and William McClayton. During the calendar year 2007, the Nominating/Corporate Governance Committee of the Fund's Board performed similar functions and held three (3) meetings.

Contract Committee: The Contract Committee, which consists entirely of Independent Board Members, reviews at least annually, (a) the Fund's financial arrangements with DIMA and its affiliates, and (b) the Fund's expense ratios. The members of the Contract Committee are Robert H. Wadsworth (Chair), Keith R. Fox (Vice Chair), Henry P. Becton, Jr., Richard J. Herring, William McClayton and Jean Gleason Stromberg.

Equity Oversight Committee: The Equity Oversight Committee reviews the investment operations of those Funds that primarily invest in equity securities (except for those funds managed by a quantitative investment team). The members of the Equity Oversight Committee are John W. Ballantine (Chair), William McClayton (Vice Chair), Henry P. Becton, Jr., Keith R. Fox, Richard J. Herring and Rebecca W. Rimel. During the calendar year 2007, the Equity Oversight Committee of the Fund's Board performed similar functions and held six (6) meetings.

Fixed-Income and Quant Oversight Committee: The Fixed-Income and Quant Oversight Committee reviews the investment operations of those Funds that primarily invest in fixed-income securities or are managed by a quantitative investment team. The members of the Fixed-Income and Quant Oversight Committee are William N. Searcy, Jr. (Chair), Jean Gleason Stromberg (Vice Chair), Dawn-Marie Driscoll, Paul K. Freeman, Kenneth C. Froewiss and Robert H. Wadsworth. During the calendar year 2007, the Fixed-Income Oversight Committee of the Fund's Board performed similar functions and held six (6) meetings.

Marketing and Shareholder Services Committee: The Marketing and Shareholder Services Committee reviews the Fund's marketing program, sales practices and literature and shareholder services. The members of the Marketing and Shareholder Services Committee are Richard J. Herring (Chair), Dawn-Marie Driscoll (Vice Chair), Paul K. Freeman, Rebecca W. Rimel, Jean Gleason Stromberg and Robert H. Wadsworth. During the calendar year 2007, the Marketing/Distribution/Shareholder Service Committee of the Fund's Board performed similar functions and held seven (7) meetings. ]

The Operations Committee: The Operations Committee reviews the administrative operations, legal affairs and general compliance matters of the Fund. The Operations Committee reviews administrative matters related to the operations of the Fund, policies and procedures relating to portfolio transactions, custody arrangements, fidelity bond and insurance arrangements, valuation of Fund assets and securities and such other tasks as the full Board deems necessary or appropriate. The Operations Committee also oversees the valuation of the Fund's securities and other assets and determines, as needed, the fair value of Fund securities or other assets under certain circumstances as described in the Fund's Valuation Procedures. The Operations Committee has appointed a Valuation Sub-Committee, which may make determinations of fair value required when the Operations Committee is not in session. The members of the Operations Committee are Paul K. Freeman (Chair), Dawn-Marie Driscoll (Vice Chair), John W. Ballantine, Kenneth C. Froewiss, Rebecca W. Rimel and William N. Searcy, Jr. The members of the Valuation Sub-Committee are Kenneth C. Froewiss (Chair), John W. Ballantine, Dawn-Marie Driscoll (Alternate), Paul K. Freeman (Alternate), Rebecca W. Rimel (Alternate) and William N. Searcy, Jr. (Alternate). During the calendar year 2007, the Expenses/Operations Committee and Valuation Committee performed similar functions and each held nine (9) meetings and six (6)meetings, respectively.

Ad Hoc Committees. In addition to the standing committees described above, from time to time the Board may also form ad hoc committees to consider specific issues.

Remuneration. Each Independent Board Member receives compensation from the Fund for his or her services, which includes an annual retainer and an attendance fee for each meeting attended. No additional compensation is paid to any Independent Board Member for travel time to meetings, attendance at directors' educational seminars or conferences, service on industry or association committees, participation as speakers at directors' conferences or service on special fund industry director task forces or subcommittees. Independent Board Members do not receive any employee benefits such as pension or retirement benefits or health insurance from the Fund or any fund in the DWS fund complex.

Board Members who are officers, directors, employees or stockholders of Deutsche Asset Management or its affiliates receive no direct compensation from the Fund, although they are compensated as employees of Deutsche Asset Management, or its affiliates, and as a result may be deemed to participate in fees paid by the Fund. The following tables show compensation from the Fund and aggregate compensation from all of the funds in the DWS fund complex received by each Independent Board Member during the calendar year 2007. Mr. Schwarzer is an interested person of the Fund and received no compensation from the Fund or any fund in the DWS fund complex during the relevant periods.

 Aggregate Compensation Aggregate Compensation Total Compensation
 from DWS Money Market from Cash Management from Fund and
Name of Board Member Series Portfolio DWS Fund Complex(1)
-------------------- ------ --------- -------------------

John W. Ballantine $0 $0 $215,000
Henry P. Becton, Jr.(2) $33,817 $35,760 $200,000
Dawn-Marie Driscoll(2)(3) $41,978 $45,830 $253,000
Keith R. Fox(2) $34,003 $36,160 $203,000
Paul K. Freeman(4) $0 $0 $265,000
Kenneth C. Froewiss(2) $33,496 $35,612 $200,000
Richard J. Herring(2) $32,413 $35,052 $195,000
William McClayton(5) $0 $0 $205,000
Rebecca W. Rimel(2) $31,573 $34,139 $194,000
William N. Searcy, Jr.(2) $33,496 $35,612 $200,000
Jean Gleason Stromberg(2) $31,573 $33,742 $189,000
Robert H. Wadsworth $0 $0 $245,250

(1) The DWS fund complex is composed of 138 funds as of December 31, 2007.

(2) Aggregate compensation includes amounts paid to the Board Members for special meetings of ad hoc committees of the board in connection with the consolidation of the DWS fund boards and various funds, meetings for considering fund expense simplification initiatives, and consideration of issues specific to the Fund's direct shareholders (i.e., those shareholders who did not purchase shares through financial intermediaries). Such amounts totaled $1,000 for Mr. Becton, $1,000 for Ms. Driscoll, $1,000 for Mr. Fox, $1,000 for Mr. Froewiss, $1,000 for Dr. Herring, $5,000 for Ms. Rimel, $1,000 for Mr. Searcy and $1,000 for Ms. Stromberg. These meeting fees were borne by the Advisor.

(3) Includes $50,000 in annual retainer fees received by Ms. Driscoll as Chairperson of certain DWS funds.

(4) Includes $25,000 paid to Dr. Freeman for numerous special meetings of an ad hoc committee in connection with board consolidation initiatives and $50,000 in annual retainer fees received by Dr. Freeman as Chairperson of certain DWS funds.

(5) Does not include $15,000 to be paid to Mr. McClayton in calendar year 2008 for numerous special meetings of an ad hoc committee of the former Chicago Board in connection with board consolidation initiatives.

Dr. Freeman, prior to his service as Independent Board Member, served as a board member of certain funds in the Deutsche Bank complex ("DB Funds"). In connection with his resignation and the resignation of certain other board members of the DB Funds on July 30, 2002 (the "Effective Date"), which was part of a restructuring of the boards overseeing the DB Funds, Deutsche Asset Management, Inc. ("DAMI") agreed to recommend, and, if necessary obtain, directors and officers ("D&O") liability insurance coverage for the prior board members, including Dr. Freeman, that is at least as equivalent in scope and amount to the D&O coverage provided to the prior board members for the six-year period following the Effective Date. In the event that D&O insurance coverage is not available in the commercial marketplace on commercially reasonable terms from a conventional third party insurer, DeAM reserved the right to provide substantially equivalent protection in the form of an indemnity or financial guarantee from an affiliate of DeAM. The D&O policy in effect prior to the Effective Date provided aggregate coverage of $25,000,000, subject to a $250,000 per claim deductible.

Board Member Ownership in the Fund

The following table shows the dollar range of equity securities beneficially owned by each Board Member in the Fund and DWS fund complex as of December 31, 2007.

 Aggregate Dollar Range of
 Dollar Range of Beneficial Ownership in all Funds Overseen by
 Ownership Board Member
Board Member in DWS Money Market Series in the DWS Fund Complex(1)
------------ -------------------------- --------------------------

Independent Board Member:
-------------------------

John W. Ballantine None Over $100,000
Henry P. Becton, Jr. $10,001 - $50,000 Over $100,000
Dawn-Marie Driscoll $10,001 - $50,000 Over $100,000
Keith R. Fox None Over $100,000
Paul K. Freeman None Over $100,000
Kenneth C. Froewiss None Over $100,000
Richard J. Herring None Over $100,000
William McClayton None Over $100,000
Rebecca W. Rimel None Over $100,000
William N. Searcy, Jr. $10,001 - $50,000 Over $100,000
Jean Gleason Stromberg Over $100,000 Over $100,000
Robert H. Wadsworth None Over $100,000

Interested Board Member:
------------------------

Axel Schwarzer None Over $100,000

(1) Securities beneficially owned as defined under the 1934 Act include direct and/or indirect ownership of securities where the Board Member's economic interest is tied to the securities, employment ownership and securities when the Board Member can exert voting power, and when the Board Member has authority to sell the securities. The dollar ranges are: None, $1-$10,000, $10,001-$50,000, $50,001-$100,000 and over $100,000.

Ownership in Securities of the Advisor and Related Companies

As reported to the Fund, the information in the following table reflects ownership by the Independent Board Members and their immediate family members of certain securities as of December 31, 2007. Immediate family members can be a spouse, children residing in the same household including step and adoptive children, and any dependents. The securities represent ownership in the Advisor or principal underwriter of the Fund and any persons (other than a registered investment company) directly or indirectly controlling, controlled by, or under common control with the Advisor or principal underwriter of the Fund (including Deutsche Bank AG).

 Value of Percent of
 Owner and Securities on Class on an
Independent Relationship to Title of an Aggregate Aggregate
Board Member Board Member Company Class Basis Basis
------------ ------------ ------- ----- ----- -----

John W. Ballantine None
Henry P. Becton, Jr. None
Dawn-Marie Driscoll None
Keith R. Fox None
Paul K. Freeman None
Kenneth C. Froewiss None
Richard J. Herring None
William McClayton None
Rebecca W. Rimel None
William N. Searcy, Jr. None
Jean Gleason Stromberg None
Robert H. Wadsworth None

Securities Beneficially Owned

As of April 8, 2008, the Board Members and officers of the Trust owned, as a group, less than 1% of the outstanding shares of the Fund.

To the best of the Fund's knowledge, as of April 8, 2008, no person owned of record or beneficially 5% or more of any class of the Fund's outstanding shares, except as noted below.

DWS Money Market Series

Name and Address of Investor Ownership Shares % of Total Shares
-------------------------------------- ------ -----------------

STABLE INVESTMENT CORPORATION 1,492,389,174.77 6.9% of Institutional Shares
ATTN RONG WANG
NORTH ST PONGCHENG DIST
BEIJING PR CHINA 100010

MELLON BANK NA 1,437,807,511.86 6.65% of Institutional Shares
PITTSBURGH PA 15258-0001

DEUTSCHE BANK TRUST CO AMERICAS 1,333,911,219.47 6.17% of Institutional Shares
ATTN ROBERT L BOHAN
TOTOWA NJ 07512-2564

WILMINGTON TRUST COMPANY 310,033,736.37 47.1% of Managed Shares
ATTN MUTUAL FUNDS
WILMINGTON DE 19890-0001

HARE & CO 76,963,007.61 11.69% of Managed Shares
SPECIAL PROCESSING DEPT
ATTN STIF DEPT
EAST SYRACUSE NY 13057-1382

KNOTFLOAT & CO 76,683,850.96 11.65% of Managed Shares
C/O STATE STREET BANK
QUINCY MA 02169-0938

TURTLE & CO 60,024,391.04 9.12% of Managed Shares
SWEEP
C/O STATE STREET BANK & TRUST
BOSTON MA 02206-5489

Agreement to Indemnify Independent Trustees for Certain Expenses

In connection with litigation or regulatory action related to possible improper market timing or other improper trading activity or possible improper marketing and sales activity in certain DWS Funds (the "Affected Funds"), DIMA has agreed to indemnify and hold harmless the Affected Funds ("Fund Indemnification Agreement") against any and all loss, damage, liability and expense, arising from market timing or marketing and sales matters alleged in any enforcement actions brought by governmental authorities involving or potentially affecting the Affected Funds or DIMA ("Enforcement Actions") or that are the basis for private actions brought by shareholders of the Affected Funds against the Affected Funds, their directors and officers, DIMA and/or certain other parties ("Private Litigation"), or any proceedings or actions that may be threatened or commenced in the future by any person (including governmental authorities), arising from or similar to the matters alleged in the Enforcement Actions or Private Litigation. In recognition of its undertaking to indemnify the Affected Funds and in light of the rebuttable presumption generally afforded to independent directors/trustees of investment companies that they have not engaged in disabling conduct, DIMA has also agreed, subject to applicable law and regulation, to indemnify certain (or, with respect to certain Affected Funds, all) of the Independent Trustees of the Affected Funds, against certain liabilities the Independent Trustees may incur from the matters alleged in any Enforcement Actions or Private Litigation or arising from or similar to the matters alleged in the Enforcement Actions or Private Litigation, and advance expenses that may be incurred by the Independent Trustees in connection with any Enforcement Actions or Private Litigation. DIMA is not, however, required to provide indemnification and advancement of expenses: (1) with respect to any proceeding or action which the Affected Funds' Board determines that the Independent Trustees ultimately would not be entitled to indemnification or (2) for any liability of the Independent Trustees to the Funds or their shareholders to which the Independent Trustee would otherwise be subject by reason of willful misfeasance, bad faith, gross negligence or reckless disregard of the Independent Trustee's duties as a director or trustee of the Affected Funds as determined in a final adjudication in such action or proceeding. The estimated amount of any expenses that may be advanced to the Independent Trustees or indemnity that may be payable under the indemnity agreements is currently unknown. These agreements by DIMA will survive the termination of the investment management agreements between DIMA and the Affected Funds.

TRUST ORGANIZATION

The Trustees have the authority to create additional Funds and to designate the relative rights and preferences as between the different Funds. The Trustees also may authorize the division of shares of a Fund into different classes, which may bear different expenses. All shares issued and outstanding are fully paid and non-assessable, transferable, have no pre-emptive or conversion rights and are redeemable as described in the SAI and in the Fund's prospectus. Each share has equal rights with each other share of the same class of the Fund as to voting, dividends, exchanges, conversion features and liquidation. Shareholders are entitled to one vote for each full share held and fractional votes for fractional shares held. The Trustees may also terminate any Fund or class by notice to the shareholders without shareholder approval. Currently, Prime Reserve Class S, Premium Class S, Institutional Shares and Managed Shares are offered.

Each Trustee serves until the next meeting of shareholders, if any, called for the purpose of electing Trustees and until the election and qualification of a successor or until such Trustee sooner dies, resigns, retires or is removed.

Any of the Trustees may be removed (provided the aggregate number of Trustees after such removal shall not be less than one) with cause, by the action of two-thirds of the remaining Trustees. Any Trustee may be removed at any meeting of shareholders by vote of two-thirds of the outstanding shares. The Trustees shall promptly call a meeting of the shareholders for the purpose of voting upon the question of removal of any such Trustee or Trustees when requested in writing to do so by the holders of not less than ten percent of the outstanding shares, and in that connection, the Trustees will assist shareholder communications to the extent provided for in Section 16(c) under the 1940 Act.

The Trust is a Massachusetts business trust organized under the laws of Massachusetts and is governed by an Amended and Restated Declaration of Trust that was approved by shareholders in 2006, as may be further amended from time to time (the "Declaration of Trust"). All shares issued and outstanding are fully paid and non-assessable, transferable, have no pre-emptive or conversion rights (except as may be determined by the Board of Trustees) and are redeemable as described in the SAI and a Fund's prospectus. Each share has equal rights with each other share of the same class of the Fund as to voting, dividends, exchanges, conversion features and liquidation. Shareholders are entitled to one vote for each full share held and fractional votes for fractional shares held.

The Fund generally is not required to hold meetings of its shareholders. Under the Declaration of Trust, however, shareholder meetings will be held in connection with the following matters to the extent and as provided in the Declaration of Trust and as required by applicable law: (a) the election or removal of trustees if a meeting is called for such purpose; (b) the termination of the Trust or a Fund; (c) an amendment of the Declaration of Trust; and (d) such additional matters as may be required by law or as the Trustees may determine to be necessary or desirable. Shareholders also vote upon changes in fundamental policies or restrictions.

The Declaration of Trust provides that shareholder meeting quorum requirements shall be established in the Trust's By-laws. The By-laws currently in effect provide that the presence in person or by proxy of the holders of thirty percent of the shares entitled to vote at a meeting (or of an individual series or class if required to vote separately) shall constitute a quorum for the transaction of business at meetings of shareholders of the Trust.

On any matter submitted to a vote of shareholders, all shares of the Trust entitled to vote shall, except as otherwise provided in the Trust's By-Laws, be voted in the aggregate as a single class without regard to series or classes of shares, except (a) when required by applicable law or when the Trustees shall have determined that the matter affects one or more series or classes of shares materially differently, shares shall be voted by individual series or class; and
(b) when the Trustees have determined that the matter affects only the interests of one or more series or classes, only shareholders of such series or classes shall be entitled to vote thereon.

The Declaration of Trust provides that the Board of Trustees may, in its discretion, establish minimum investment amounts for shareholder accounts, impose fees on accounts that do not exceed a minimum investment amount and involuntarily redeem shares in any such account in payment of such fees. The Board of Trustees, in its sole discretion, also may cause the Trust to redeem all of the shares of the Trust or one or more series or classes held by any shareholder for any reason, to the extent permissible by the 1940 Act, including
(a) if the shareholder owns shares having an aggregate net asset value of less than a specified minimum amount, (b) if a particular shareholder's ownership of shares would disqualify a series from being a regulated investment company, (c) upon a shareholder's failure to provide sufficient identification to permit the Trust to verify the shareholder's identity, (d) upon a shareholder's failure to pay for shares or meet or maintain the qualifications for ownership of a particular class or series of shares, (e) if the Board of Trustees determines (or pursuant to policies established by the Board it is determined) that share ownership by a particular shareholder is not in the best interests of remaining shareholders, (f) when a Fund is requested or compelled to do so by governmental authority or applicable law and (g) upon a shareholder's failure to comply with a request for information with respect to the direct or indirect ownership of shares of the Trust. The Declaration of Trust also authorizes the Board of Trustees to terminate a Fund or any class without shareholder approval, and the Trust may suspend the right of shareholders to require the Trust to redeem shares to the extent permissible under the 1940 Act.

Upon the termination of the Trust or any series, after paying or adequately providing for the payment of all liabilities which may include the establishment of a liquidating trust or similar vehicle, and upon receipt of such releases, indemnities and refunding agreements as they deem necessary for their protection, the Trustees may distribute the remaining Trust property or property of the series, in cash or in kind or partly each, to the shareholders of the Trust or the series involved, ratably according to the number of shares of the Trust or such series held by the several shareholders of the Trust or such series on the date of termination, except to the extent otherwise required or permitted by the preferences and special or relative rights and privileges of any classes of shares of a series involved, provided that any distribution to the shareholders of a particular class of shares shall be made to such shareholders pro rata in proportion to the number of shares of such class held by each of them. The composition of any such distribution (e.g., cash, securities or other assets) shall be determined by the Trust in its sole discretion, and may be different among shareholders (including differences among shareholders in the same series or class).

Under Massachusetts law, shareholders of a Massachusetts business trust could, under certain circumstances, be held personally liable for obligations of a Fund. The Declaration of Trust, however, disclaims shareholder liability for acts or obligations of the Fund and requires that notice of such disclaimer be given in each agreement, obligation, or instrument entered into or executed by the Fund or the Fund's trustees. Moreover, the Declaration of Trust provides for indemnification out of Fund property for all losses and expenses of any shareholder held personally liable for the obligations of the Fund and the Fund may be covered by insurance which the Trustees consider adequate to cover foreseeable tort claims. Thus, the risk of a shareholder incurring financial loss on account of shareholder liability is considered by the Advisor remote and not material, since it is limited to circumstances in which a disclaimer is inoperative and the Fund itself is unable to meet its obligations.

Cash Management Portfolio (prior to February 6, 2006 known as Scudder Cash Management Portfolio and prior to May 16, 2003 known as Cash Management Portfolio) was organized as a master trust fund under the laws of the State of New York. Cash Management Portfolio's Declaration of Trust provides that the Fund and other entities investing in the Portfolio (e.g., other investment companies, insurance company separate accounts and common and commingled trust funds) will each be liable for all obligations of the Portfolio. However, the risk of the Fund incurring financial loss on account of such liability is limited to circumstances in which both inadequate insurance existed and the Portfolio itself was unable to meet its obligations. Accordingly, the Trustees of the Trust believe that neither the Fund nor its shareholders will be adversely affected by reason of the Fund's investing in the Portfolio. Whenever the Trust is requested to vote on a matter pertaining to the Portfolio, the Trust will vote its shares without a meeting of shareholders of the Fund if the proposal is one, in which made with respect to the Fund, would not require the vote of shareholders of the Fund as long as such action is permissible under applicable statutory and regulatory requirements. In addition, whenever the Trust is requested to vote on matters pertaining to the fundamental policies of the Portfolio, the Trust will hold a meeting of the Fund's shareholders and will cast its vote as instructed by the Fund's shareholders. The percentage of the Trust's votes representing Fund shareholders not voting will be voted by the Trustees of the Trust in the same proportion as the Fund shareholders who do, in fact, vote. For all other matters requiring a vote, the Trust will hold a meeting of shareholders of the Fund and, at the meeting of investors in the Portfolio, the Trust will cast all of its votes in the same proportion as the votes of the Portfolio's shareholders even if all Portfolio shareholders did not vote. Even if the Portfolio votes all its shares at the Portfolio meeting, other investors with a greater pro rata ownership of the Portfolio could have effective voting control of the operations of the Portfolio.

PROXY VOTING GUIDELINES

The Portfolio has delegated proxy voting responsibilities to its investment advisor, subject to the Board's general oversight. The Portfolio has delegated proxy voting to the Advisor with the direction that proxies should be voted consistent with the Portfolio's best economic interests. The Advisor has adopted its own Proxy Voting Policies and Procedures ("Policies"), and Proxy Voting Guidelines ("Guidelines") for this purpose. The Policies address, among other things, conflicts of interest that may arise between the interests of the Portfolio, and the interests of the Advisor and its affiliates, including the Fund's principal underwriter. The Guidelines set forth the Advisor's general position on various proposals, such as:

o Shareholder Rights -- The Advisor generally votes against proposals that restrict shareholder rights.
o Corporate Governance -- The Advisor generally votes for confidential and cumulative voting and against supermajority voting requirements for charter and bylaw amendments. The Advisor generally votes for proposals to restrict a chief executive officer from serving on more than three outside boards of directors. The Advisor generally votes against proposals that require a company to appoint a Chairman who is an independent director.
o Anti-Takeover Matters -- The Advisor generally votes for proposals that require shareholder ratification of poison pills or that request boards to redeem poison pills, and votes against the adoption of poison pills if they are submitted for shareholder ratification. The Advisor generally votes for fair price proposals.
o Compensation Matters -- The Advisor generally votes for executive cash compensation proposals, unless they are unreasonably excessive. The Advisor generally votes against stock option plans that do not meet the Advisor's criteria.
o Routine Matters -- The Advisor generally votes for the ratification of auditors, procedural matters related to the annual meeting and changes in company name, and against bundled proposals and adjournment.

The general provisions described above do not apply to investment companies. The Advisor generally votes proxies solicited by investment companies in accordance with the recommendations of an independent third party, except for proxies solicited by or with respect to investment companies for which the Advisor or an affiliate serves as investment advisor or principal underwriter ("affiliated investment companies"). The Advisor votes affiliated investment company proxies in the same proportion as the vote of the investment company's other shareholders (sometimes called "mirror" or "echo" voting). Master fund proxies solicited from feeder funds are voted in accordance with applicable requirements of the Investment Company Act of 1940.

Although the Guidelines set forth the Advisor's general voting positions on various proposals, the Advisor may, consistent with the Portfolio's best interests, determine under some circumstances to vote contrary to those positions.

The Guidelines on a particular issue may or may not reflect the view of individual members of the Board or of a majority of the Board. In addition, the Guidelines may reflect a voting position that differs from the actual practices of the public companies within the Deutsche Bank organization or of the investment companies for which the Advisor or an affiliate serves as investment advisor or sponsor.

The Advisor may consider the views of a portfolio company's management in deciding how to vote a proxy or in establishing general voting positions for the Guidelines, but management's views are not determinative.

As mentioned above, the Policies describe the way in which the Advisor resolves conflicts of interest. To resolve conflicts, the advisor, under normal circumstances, votes proxies in accordance with its Guidelines. If the Advisor departs from the Guidelines with respect to a particular proxy or if the Guidelines do not specifically address a certain proxy proposal, a proxy voting committee established by the advisor will vote the proxy. Before voting any such proxy, however, the Advisor's conflicts review committee will conduct an investigation to determine whether any potential conflicts of interest exist in connection with the particular proxy proposal. If the conflicts review committee determines that the Advisor has a material conflict of interest, or certain individuals on the proxy voting committee should be recused from participating in a particular proxy vote, it will inform the proxy voting committee. If notified that the Advisor has a material conflict, or fewer than three voting members are eligible to participate in the proxy vote, typically the Advisor will engage an independent third party to vote the proxy or follow the proxy voting recommendations of an independent third party.

Under certain circumstances, the Advisor may not be able to vote proxies or the Advisor may find that the expected economic costs from voting outweigh the benefits associated with voting. For example, the Advisor may not vote proxies on certain foreign securities due to local restrictions or customs. The Advisor generally does not vote proxies on securities subject to share blocking restrictions.

You may obtain information about how a Fund voted proxies related to its portfolio securities during the 12-month period ended June 30 by visiting the Securities and Exchange Commission's Web site at www.sec.gov or by visiting our Web site at: www.dws-scudder.com (click on "proxy voting" at the bottom of the page).

FINANCIAL STATEMENTS

The financial statements, including the portfolio of investments, of DWS Money Market Trust, together with the Report of Independent Registered Public Accounting Firm, Financial Highlights and notes to financial statements in the Annual Report to the Shareholders of the Fund dated December 31, 2007 are incorporated herein by reference and are hereby deemed to be a part of this combined Statement of Additional Information.

ADDITIONAL INFORMATION

The CUSIP number of the DWS Prime Reserve Class S is 23337T607.

The CUSIP number of the DWS Premium Class S is 23337T409.

The CUSIP number of the DWS Institutional Shares is 23337T201.

The CUSIP number of the DWS Managed Shares is 23337T102.

The Fund has a fiscal year end of December 31, ______.

On June 7, 2007, the Trust's Board of Trustees approved a change in the Fund's fiscal year end from May 31 to December 31, effective December 31, 2007. Information enumerated below is provided at the Fund level.

The Fund, on behalf of its Managed Shares, may enter into arrangements with banks and other institutions which are omnibus account holders of shares of the Managed Shares class providing for the payment of fees to the institution for servicing and maintaining accounts of beneficial owners of the omnibus account. Such payments are expenses of the Managed Shares class only.

The Fund's Prospectus and this Statement of Additional Information omit certain information contained in the Registration Statement and its amendments which the Trust has filed with the SEC under the Securities Act of 1933 and reference is hereby made to the Registration Statement for further information with respect to the Trust and the securities offered hereby. The Registration Statement and its amendments are available for inspection by the public at the SEC in Washington, D.C.

APPENDIX

The following is a description of the ratings given by Moody's, S&P and Fitch to corporate and municipal bonds, corporate and municipal commercial paper and municipal notes.

Corporate and Municipal Bonds

Moody's: The four highest ratings for corporate and municipal bonds are "Aaa," "Aa," "A" and "Baa." Bonds rated "Aaa" are judged to be of the "best quality" and carry the smallest degree of investment risk. Bonds rated "Aa" are of "high quality by all standards," but margins of protection or other elements make long-term risks appear somewhat greater than "Aaa" rated bonds. Bonds rated "A" possess many favorable investment attributes and are considered to be upper medium grade obligations. Bonds rated "Baa" are considered to be medium grade obligations, neither highly protected nor poorly secured. Moody's applies numerical modifiers 1, 2 and 3 in each rating category from "Aa" through "Baa" in its rating system. The modifier 1 indicates that the security ranks in the higher end of the category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates that the issue ranks in the lower end.

S&P: The four highest ratings for corporate and municipal bonds are "AAA," "AA," "A" and "BBB." Bonds rated "AAA" have the highest ratings assigned by S&P and have an extremely strong capacity to pay interest and repay principal. Bonds rated "AA" have a "very strong capacity to pay interest and repay principal" and differ "from the higher rated issues only in small degree." Bonds rated "A" have a "strong capacity" to pay interest and repay principal, but are "somewhat more susceptible to" adverse effects of changes in economic conditions or other circumstances than bonds in higher rated categories. Bonds rated "BBB" are regarded as having an "adequate capacity" to pay interest and repay principal, but changes in economic conditions or other circumstances are more likely to lead a "weakened capacity" to make such payments. The ratings from "AA" to "BBB" may be modified by the addition of a plus or minus sign to show relative standing within the category.

Fitch: The four highest ratings of Fitch for corporate and municipal bonds are "AAA," "AA," "A" and "BBB." Bonds rated "AAA" are considered to be investment-grade and of the highest credit quality. The obligor has an exceptionally strong ability to pay interest and repay principal, which is unlikely to be affected by reasonably foreseeable events. Bonds rated "AA" are considered to be investment grade and of very high credit quality. The obligor's ability to pay interest and repay principal is very strong, although not quite as strong as bonds rated "AAA." Because bonds rated in the "AAA" and "AA" categories are not significantly vulnerable to foreseeable future developments, short-term debt of these issuers is generally rated "F1+." Bonds rated "A" are considered to be investment grade and of high credit quality. The obligor's ability to pay interest and repay principal is considered to be strong, but may be more vulnerable to adverse changes in economic conditions and circumstances than bonds with higher rates. Bonds rated "BBB" are considered to be investment grade and of satisfactory credit quality. The obligor's ability to pay interest and repay principal is considered to be adequate. Adverse changes in economic conditions and circumstances, however, are more likely to have adverse effects on these bonds, and therefore impair timely payment. The likelihood that the ratings of these bonds will fall below investment grade is higher than for bonds with greater ratings.

Corporate and Municipal Commercial Paper

Moody's: The highest rating for corporate and municipal commercial paper is "P-1" (Prime-1). Issuers rated "P-1" have a "superior ability for repayment of senior short-term obligations."

S&P: The "A-1" rating for corporate and municipal commercial paper indicates that the "degree of safety regarding timely payment is strong." Commercial paper with "overwhelming safety characteristics" will be rated "A-1+."

Fitch: The rating "F-1" is the highest rating assigned by Fitch. Among the factors considered by Fitch in assigning this rating are: (1) the issuer's liquidity; (2) its standing in the industry; (3) the size of its debt; (4) its ability to service its debt; (5) its profitability; (6) its return on equity;
(7) its alternative sources of financing; and (8) its ability to access the capital markets. Analysis of the relative strength or weakness of these factors and others determines whether an issuer's commercial paper is rated "F-1."

Municipal Notes

Moody's: The highest ratings for state and municipal short-term obligations are "MIG 1," "MIG 2," and "MIG 3" (or "VMIG 1," "VMIG 2" and "VMIG 3" in the case of an issue having a variable rate demand feature). Notes rated "MIG 1" or "VMIG 1" are judged to be of the "best quality." Notes rated "MIG 2" or "VMIG 2" are of "high quality," with margins or protection "ample although not as large as in the preceding group." Notes rated "MIG 3" or "VMIG 3" are of "favorable quality," with all security elements accounted for but lacking the strength of the preceding grades.

S&P: The "SP-1" rating reflects a "very strong or strong capacity to pay principal and interest." Notes issued with "overwhelming safety characteristics" will be rated "SP-1+." The "SP-2" rating reflects a "satisfactory capacity" to pay principal and interest.

Fitch: The highest ratings for state and municipal short-term obligations are "F-1+," "F-1" and "F-2."

PART C. OTHER INFORMATION

Item 23. Exhibits
-------- --------
 (a) (1) Amended and Restated Declaration of Trust, dated June 27, 2006.
 (Incorporated by reference to Post-Effective Amendment No. 42 to the Registrant's
 Registration Statement.)

 (2) Amended and Restated Designation of Series and Classes of Shares of Beneficial Interest,
 dated June 27, 2006, with respect to DWS Money Market Trust.
 (Incorporated by reference to Post-Effective Amendment No. 42 to the Registrant's
 Registration Statement.)

 (b) (1) By-laws of the Registrant dated June 27, 2006.
 (Incorporated by reference to Post-Effective Amendment No. 42 to the Registrant's
 Registration Statement.)

 (c) Inapplicable.

 (d) (1) Amended and Restated Investment Management Agreement, dated June 1, 2006 and as
 revised as of February 14, 2007, between the Registrant and Deutsche Investment
 Management Investment Management Americas Inc.
 (Incorporated by reference to Post-Effective Amendment No. 43 to the Registrant's
 Registration Statement.)

 (e) (1) Underwriting Agreement between the Registrant and Scudder Distributors, Inc., dated
 September 30, 2002.
 (Incorporated by reference to Post-Effective Amendment No. 37 to the Registration
 Statement.)

 (f) Inapplicable.

 (g) (1) Master Custodian Agreement with State Street Bank and Trust Company, dated March 22,
 2007.
 (Incorporated by reference to Post-Effective Amendment No. 43 to the Registrant's
 Registration Statement.)

 (h) (1) Letter of Indemnity to the Scudder Funds dated October 13, 2004.
 (Incorporated by reference to Post-Effective Amendment No. 41 to the Registration
 Statement.)

 (2) Letter of Indemnity to the Independent Trustees dated October 13, 2004.
 (Incorporated by reference to Post-Effective Amendment No. 41 to the Registration
 Statement.)

 (3) Administrative Service Agreement, dated June 1, 2006, as revised October 1, 2007.
 (Filed herein.)

 (4) Transfer Agency and Service Agreement between the Registrant and DWS Scudder Investments
 Service Company dated June 1, 2006.
 (Incorporated by reference to Post-Effective Amendment No. 42 to the Registrant's
 Registration Statement.)

 (5) Form of Mutual Fund Rule 22c-2 Information Sharing Agreement between DWS Scudder
 Distributors, Inc. and certain financial intermediaries.
 (Incorporated by reference to Post-Effective Amendment No. 43 to the Registrant's
 Registration Statement.)


 2

 (6) Form of Expense Limitation Agreement, dated October 1, 2007, between the Registrant
 and Deutsche Investment Management Americas Inc. (Filed herein.)

 (i) Legal Opinion and Consent of Counsel.
 (Incorporated by reference to Post-Effective Amendment No. 37 to the Registration
 Statement.)

 (j) Consent of Independent Registered Public Accounting Firm. (Filed herein.)

 (k) Inapplicable.

 (l) Inapplicable.

 (m) Inapplicable.

 (n) (1) Multi-Distribution Plan pursuant to Rule 18f-3.
 (Incorporated by reference to Post-Effective Amendment No. 25 Exhibit (o) to the
 Registrant's Registration Statement.)

 (2) Plan with respect to Scudder Money Market Trust pursuant to Rule 18f-3.
 (Incorporated by reference to Post-Effective Amendment No. 35 to the Registrant's
 Registration Statement.)

 (p) (1) Code of Ethics for Deutsche Asset Management - U.S., effective January 1, 2008.
 (Filed herein.)

 (2) Consolidated Fund Code of Ethics (All Funds).
 (Incorporated by reference to Post-Effective Amendment No. 41 to the Registration
 Statement.)

Item 24. Persons Controlled by or under Common Control with Registrant

None

Item 25. Indemnification

Article IV of the Registrant's Agreement and Declaration of Trust (Exhibit (a)(17) hereto, which is incorporated herein by reference) provides in effect that the Registrant will indemnify its officers and trustees under certain circumstances. However, in accordance with Section 17(h) and 17(i) of the Investment Company Act of 1940 and its own terms, said Article of the Agreement and Declaration of Trust does not protect any person against any liability to the Registrant or its shareholders to which such Trustee would otherwise be subject by reason of willful misfeasance, bad faith, gross negligence, or reckless disregard of the duties involved in the conduct of his or her office.

The Registrant has purchased insurance policies insuring its officers and trustees against certain liabilities which such officers and trustees may incur while acting in such capacities and providing reimbursement to the Registrant for sums which it may be permitted or required to pay to its officers and trustees by way of indemnification against such liabilities, subject to certain deductibles.

On April 5, 2002, Zurich Scudder Investments, Inc. ("Scudder"), the investment adviser, now known as Deutsche Investment Management Americas Inc., was acquired by Deutsche Bank AG, not including certain U.K. Operations (the "Transaction"). In connection with the Trustees' evaluation of the Transaction, Deutsche Bank agreed to indemnify, defend and hold harmless Registrant and the trustees who were not "interested persons" of Scudder, Deutsche Bank or Registrant (the "Independent Trustees") for and against any liability and claims and expenses based upon or arising from, whether in

whole or in part, or directly or indirectly, any untrue statement or alleged untrue statement of a material fact made to the Independent Trustees by Deutsche Bank in connection with the Independent Trustees' consideration of the Transaction, or any omission or alleged omission of a material fact necessary in order to make statements made, in light of the circumstances under which they were made, not misleading.

Deutsche Investment Management Americas Inc. (hereafter, "DIMA"), the investment advisor, has agreed, subject to applicable law and regulation, to indemnify and hold harmless the Registrant against any loss, damage, liability and expense, including, without limitation, the advancement and payment, as incurred, of reasonable fees and expenses of counsel (including counsel to the Registrant and counsel to the Independent Trustees) and consultants, whether retained by the Registrant or the Independent Trustees, and other customary costs and expenses incurred by the Registrant in connection with any litigation or regulatory action related to possible improper market timing or other improper trading activity or possible improper marketing and sales activity in the Registrant ("Private Litigation and Enforcement Actions"). In the event that this indemnification is unavailable to the Registrant for any reason, then DIMA has agreed to contribute to the amount paid or payable by the Registrant as a result of any loss, damage, liability or expense in such proportion as is appropriate to reflect the relative fault of DIMA and the Registrant with respect to the matters which resulted in such loss, damage, liability or expense, as well as any other relevant equitable considerations; provided, that if no final determination is made in such action or proceeding as to the relative fault of DIMA and the Registrant, then DIMA shall pay the entire amount of such loss, damage, liability or expense.

In recognition of its undertaking to indemnify the Registrant, and in light of the rebuttable presumption generally afforded to non-interested board members of an investment company that they have not engaged in disabling conduct, DIMA has also agreed, subject to applicable law and regulation, to indemnify and hold harmless each of the Independent Trustees against any and all loss, damage, liability and expense, including without limitation the advancement and payment as incurred of reasonable fees and expenses of counsel and consultants, and other customary costs and expenses incurred by the Independent Trustees, arising from the matters alleged in any Private Litigation and Enforcement Actions or matters arising from or similar in subject matter to the matters alleged in the Private Litigation and Enforcement Actions (collectively, "Covered Matters"), including without limitation:

1. all reasonable legal and other expenses incurred by the Independent Trustees in connection with the Private Litigation and Enforcement Actions, and any actions that may be threatened or commenced in the future by any person (including any governmental authority), arising from or similar to the matters alleged in the Private Litigation and Enforcement Actions, including without limitation expenses related to the defense of, service as a witness in, or monitoring of such proceedings or actions;

2. all liabilities and reasonable legal and other expenses incurred by any Independent Trustee in connection with any judgment resulting from, or settlement of, any such proceeding, action or matter;

3. any loss or reasonable legal and other expenses incurred by any Independent Trustee as a result of the denial of, or dispute about, any insurance claim under, or actual or purported rescission or termination of, any policy of insurance arranged by DIMA (or by a representative of DIMA acting as such, acting as a representative of the Registrant or of the Independent Trustees or acting otherwise) for the benefit of the Independent Trustee, to the extent that such denial, dispute or rescission is based in whole or in part upon any alleged misrepresentation made in the application for such policy or any other alleged improper conduct on the part of DIMA, any of its corporate affiliates, or any of their directors, officers or employees;

4. any loss or reasonable legal and other expenses incurred by any Independent Trustee, whether or not such loss or expense is incurred with respect to a Covered Matter, which is otherwise covered under the terms of any specified policy of insurance, but for which the Independent Trustee is unable to obtain advancement of expenses or indemnification under that policy of insurance, due to the exhaustion of policy limits which is due in whole or in part to DIMA or any affiliate thereof having received advancement of expenses or indemnification under that policy for or with respect to any Covered Matter; provided, that the total amount that DIMA will be obligated to pay under this provision for all loss or expense shall not exceed the amount that DIMA and any of its affiliates actually receive under that policy of insurance for or with respect to any and all Covered Matters; and

5. all liabilities and reasonable legal and other expenses incurred by any Independent Trustee in connection with any proceeding or action to enforce his or her rights under the agreement, unless DIMA prevails on the merits of any such dispute in a final, nonappealable court order.

DIMA is not required to pay costs or expenses or provide indemnification to or for any individual Independent Trustee
(i) with respect to any particular proceeding or action as to which the Board of the Registrant has determined that such Independent Trustee ultimately would not be entitled to indemnification with respect thereto, or (ii) for any liability of the Independent Trustee to the Registrant or its shareholders to which such Independent Trustee would otherwise be subject by reason of willful misfeasance, bad faith, gross negligence, or reckless disregard of the Independent Trustee's duties as a Trustee of the Registrant as determined in a final adjudication in such proceeding or action. In addition, to the extent that DIMA has paid costs or expenses under the agreement to any individual Independent Trustee with respect to a particular proceeding or action, and there is a final adjudication in such proceeding or action of the Independent Trustee's liability to the Registrant or its shareholders by reason of willful misfeasance, bad faith, gross negligence, or reckless disregard of the Independent Trustee's duties as a Trustee of the Registrant, such Independent Trustee has undertaken to repay such costs or expenses to DIMA.

Item 26. Business and Other Connections of Investment Advisor

During the last two fiscal years, no director or officer of Deutsche Investment Management Americas Inc., the investment advisor, has engaged in any other business, profession, vocation or employment of a substantial nature other than that of the business of investment management and, through affiliates, investment banking.

Item 27. Principal Underwriters

(a)

DWS Scudder Distributors, Inc. acts as principal underwriter of the Registrant's shares and acts as principal underwriter for registered open-end management investment companies other funds managed by Deutsche Investment Management Americas Inc.

(b)

Information on the officers and directors of DWS Scudder Distributors, Inc., principal underwriter for the Registrant, is set forth below. The principal business address is 222 South Riverside Plaza, Chicago, Illinois 60606.

 (1) (2) (3)
DWS Scudder Distributors, Inc.
Name and Principal Positions and Offices with Positions and
Business Address DWS Scudder Distributors, Inc. Offices with Registrant
---------------- ------------------------------ -----------------------
Philipp Hensler Director, Chairman of the Board and None
345 Park Avenue CEO
New York, NY 10154

Michael Colon Director and Chief Operating Officer None
345 Park Avenue
New York, NY 10154

Thomas Winnick Director and President None
345 Park Avenue
New York, NY 10154

Cliff Goldstein Chief Financial Officer and None
60 Wall Street Treasurer
New York, NY 10005

Robert Froehlich Vice President None
222 South Riverside Plaza
Chicago, IL 60606

Paul Schubert Vice President Chief Financial Officer
345 Park Avenue and Treasurer
New York, NY 10154

Mark Perrelli Vice President None
222 South Riverside Plaza
Chicago, IL 60606

Donna White Chief Compliance Officer None
345 Park Avenue
New York, NY 10154

Jason Vazquez Vice President and AML Compliance AML Compliance Officer
345 Park Avenue Officer
New York, NY 10154

Caroline Pearson Secretary Assistant Secretary
Two International Place
Boston, MA 02110

Philip J. Collora Assistant Secretary None
222 South Riverside Plaza
Chicago, IL 60606


 6

 (1) (2) (3)
DWS Scudder Distributors, Inc.
Name and Principal Positions and Offices with Positions and
Business Address DWS Scudder Distributors, Inc. Offices with Registrant
---------------- ------------------------------ -----------------------

Anjie LaRocca Assistant Secretary None
345 Park Avenue
New York, NY 10154

Item 28. Location of Accounts and Records

Certain accounts, books and other documents required to be maintained by Section 31(a) of the 1940 Act and the Rules promulgated thereunder are maintained by Deutsche Investment Management Americas Inc., 345 Park Avenue, New York, NY 10154. Records relating to the duties of the Registrant's custodian are maintained by State Street Bank and Trust Company, 225 Franklin Street, Boston, Massachusetts, 02110. Records relating to the duties of the Registrant's transfer agent are maintained by DWS Scudder Investments Services Company ("DWS-SISC"), 222 South Riverside Plaza, Chicago, IL 60606 and DST (as sub transfer agent), 811 Main Street, Kansas City, MO, 64105.

Item 29. Management Services

Inapplicable.

Item 30. Undertakings

Inapplicable.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this amendment to its Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of New York and the State of New York on the 15th day of April 2008.

DWS MONEY MARKET TRUST

By: /s/Michael G. Clark
 ____________________________
 Michael G. Clark

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to its Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

SIGNATURE TITLE DATE
--------- ----- ----
/s/Michael G. Clark
-------------------------------------
Michael G. Clark President April 15, 2008

/s/Paul H. Schubert
-------------------------------------
Paul H. Schubert Chief Financial Officer and Treasurer April 15, 2008

/s/John W. Ballantine
-------------------------------------
John W. Ballantine* Trustee April 15, 2008

/s/Henry P. Becton, Jr.
-------------------------------------
Henry P. Becton, Jr.* Trustee April 15, 2008

/s/Dawn-Marie Driscoll
-------------------------------------
Dawn-Marie Driscoll* Chairperson and Trustee April 15, 2008

/s/Keith R. Fox
-------------------------------------
Keith R. Fox* Trustee April 15, 2008

/s/Paul K. Freeman
-------------------------------------
Paul K. Freeman* Vice Chairperson and Trustee April 15, 2008

/s/Kenneth C. Froewiss
-------------------------------------
Kenneth C. Froewiss* Trustee April 15, 2008

/s/Richard J. Herring
-------------------------------------
Richard J. Herring* Trustee April 15, 2008

/s/William McClayton
-------------------------------------
William McClayton* Trustee April 15, 2008

/s/Rebecca W. Rimel
-------------------------------------
Rebecca W. Rimel* Trustee April 15, 2008

/s/William N. Searcy, Jr.
-------------------------------------
William N. Searcy, Jr.* Trustee April 15, 2008

SIGNATURE TITLE DATE
--------- ----- ----

/s/Jean Gleason Stromberg
-------------------------------------
Jean Gleason Stromberg* Trustee April 15, 2008

/s/Robert H. Wadsworth
-------------------------------------
Robert H. Wadsworth* Trustee April 15, 2008

/s/Axel Schwarzer
-------------------------------------
Axel Schwarzer* Trustee April 15, 2008

*By: /s/Caroline Pearson
 ------------------------------
 Caroline Pearson**
 Assistant Secretary

** Attorney-in-fact pursuant to the powers of attorney as filed herein.

SIGNATURES

Pursuant to the requirements of the Investment Company Act of 1940, CASH MANAGEMENT PORTFOLIO has duly caused this Amendment No. 24 to the Registration Statement on Form N-1A to be signed on its behalf by the undersigned, thereto duly authorized, in the City of New York and the State of New York on the 15th day of April 2008.

CASH MANAGEMENT PORTFOLIO

By: /s/ Michael Clark
 ---------------------------------------
 Michael Clark
 President

DWS MONEY MARKET TRUST

Power of Attorney

KNOW ALL PERSONS BY THESE PRESENTS, that the following persons, whose signatures appear below, do hereby constitute and appoint Thomas Connors, John Millette and Caroline Pearson, and each of them, severally, or if more than one acts, a majority of them, their true and lawful attorney and agent to execute in their name, place and stead (in such capacity) any and all amendments to enable DWS MONEY MARKET TRUST (the "Fund") to comply with the Securities Act of 1933, as amended (the "1933 Act") and the Investment Company Act of 1940, as amended (the "1940 Act"), and any rules, regulations or requirements of the Securities and Exchange Commission in respect thereof, in connection with the Fund's Registration Statement on Form N-1A pursuant to the 1933 Act and the 1940 Act, together with any and all pre- and post-effective amendments thereto, including specifically, but without limiting the generality of the foregoing, the power and authority to sign in the name and on behalf of the undersigned as a trustee of the Fund such Registration Statement and any and all such pre- and post-effective amendments filed with the Securities and Exchange Commission under the 1933 Act and the 1940 Act, and any other instruments or documents related thereto, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or either of them or their substitute or substitutes, shall lawfully do or cause to be done by virtue hereof.

---------------------------------------------------------- ----------------------------- -----------------------------------
SIGNATURES TITLE DATE
---------------------------------------------------------- ----------------------------- -----------------------------------
/s/John W. Ballantine Trustee April 1, 2008
John W. Ballantine
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Henry P. Becton, Jr. Trustee April 1, 2008
Henry P. Becton, Jr.
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Dawn-Marie Driscoll Trustee April 1, 2008
Dawn-Marie Driscoll
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Keith R. Fox Trustee April 1, 2008
Keith R. Fox
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Paul K. Freeman Trustee April 1, 2008
Paul K. Freeman
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Kenneth C. Froewiss Trustee April 1, 2008
Kenneth C. Froewiss
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Richard J. Herring Trustee April 1, 2008
Richard J. Herring
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/William McClayton Trustee April 1, 2008
William McClayton
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Rebecca W. Rimel Trustee April 1, 2008
Rebecca W. Rimel
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/William N. Searcy, Jr. Trustee April 1, 2008
William N. Searcy, Jr.
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Jean Gleason Stromberg Trustee April 1, 2008
Jean Gleason Stromberg
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Robert H. Wadsworth Trustee April 1, 2008
Robert H. Wadsworth
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Axel Schwarzer Trustee April 1, 2008
Axel Schwarzer
---------------------------------------------------------- ----------------------------- -----------------------------------

File No. 2-78122 File No. 811-3495

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

EXHIBITS

FORM N-1A

POST-EFFECTIVE AMENDMENT NO. 45

TO REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

AND

AMENDMENT NO. 41

TO REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940

DWS MONEY MARKET TRUST

EXHIBIT INDEX

(h)(3)

(h)(6)

(j)

(p)(1)

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