ACGL Arch Capital Group Ltd

Arch Capital Group Ltd. (NASDAQ: ACGL) announced that it expects to release its 2007 fourth quarter results after the close of regular stock market hours on Monday, February 11, 2008. The Company will hold a conference call for investors and analysts at 11:00 a.m. Eastern Time on Tuesday, February 12, 2008. A live webcast of this call will be available via the Media-Earnings Webcasts section of the Company�s website at http://www.archcapgroup.bm and will be archived on the website from 1:00 p.m. Eastern Time on February 12 through midnight Eastern Time on March 12, 2008. A telephone replay of the conference call also will be available beginning on February 12 at 1:00 p.m. Eastern Time until February 19, 2008 at midnight Eastern Time. To access the replay, domestic callers should dial 888-286-8010 (passcode 57998007), and international callers should dial 617-801-6888 (passcode 57998007). Arch Capital Group Ltd., a Bermuda-based company with approximately $4.2 billion in capital at September 30, 2007, provides insurance and reinsurance on a worldwide basis through its wholly owned subsidiaries.