NEW YORK, Nov. 20 /PRNewswire-FirstCall/ -- The Boards of Directors of Alliance National Municipal Income Fund, Inc. ("Alliance National Municipal" - NYSE: AFB) and ACM Municipal Securities Income Fund, Inc. ("ACM Municipal Securities" - NYSE: AMU) have approved today a proposal of the acquisition of the assets and the assumption of the liabilities of ACM Municipal Securities by Alliance National Municipal (the "Acquisition"). The Acquisition is subject to stockholders of ACM Municipal Securities approving the Acquisition and is subject to the stockholders of Alliance National Municipal approving the issuance of Alliance National Municipal common stock for exchange in the Acquisition. A Special Meeting of Stockholders of ACM Municipal Securities is scheduled to be held on Thursday, February 22, 2007. The close of business on December 15, 2006 has been fixed as the record date for the Special Meeting of Stockholders. Assuming stockholders of Alliance National Municipal approve the issuance of that Fund's common stock for exchange in the Acquisition, the Acquisition, if approved by stockholders of ACM Municipal Securities, is expected to take place in mid-2007. ACM Municipal Securities and Alliance National Municipal are diversified, closed-end U.S.-registered management investment companies. Both Funds are advised by AllianceBernstein L.P. As of November 16, 2006, the net assets of ACM Municipal Securities and Alliance National Municipal were $217 million and $514 million, respectively. DATASOURCE: Alliance National Municipal Income Fund, Inc. CONTACT: Shareholder, 1-800-221-5672 Web site: http://www.alliancebernstein.com/

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