NEW YORK, May 18 /PRNewswire-FirstCall/ -- ACM Municipal Securities Income Fund, Inc. ("ACM Municipal"; NYSE: AMU) announced that the acquisition of the assets and the assumption of the liabilities of ACM Municipal by AllianceBernstein National Municipal Income Fund, Inc. ("National Municipal" - NYSE: AFB) (the "Acquisition") took place as of the close of business on May 18, 2007. As a result of the Acquisition, the holders of preferred shares series A, B, and C of ACM Municipal received preferred shares series W, M, and TH, respectively, of National Municipal. Set forth below is a list of the preferred shares series of each Fund and its respective auction interest rate as of the close of business on May 18, 2007: ACM Municipal Preferred Shares Series A 3.88% Series B 3.90% Series C 3.80% National Municipal Preferred Shares Series W 3.80% Series M 3.80% Series TH 3.85% DATASOURCE: ACM Municipal Securities Income Fund, Inc CONTACT: ACM Municipal Securities Income Fund, Inc, Shareholder Contact, +1-800-221-5672 Web site: http://www.alliancebernstein.com/

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