NEW YORK, Aug. 23 /PRNewswire-FirstCall/ -- ACM Municipal Securities Income Fund, Inc. [NYSE: AMU] (the "Fund") today released its monthly portfolio update as of July 31, 2005. ACM Municipal Securities Income Fund, Inc. Top 10 Fixed-Income Holdings Portfolio% 1) Tennessee Ed Loan Ser 97B AMT 6.200% (12/01/21) 4.63% 2) Florida Hsg Fin Corp AMT FSA 5.400% (03/01/42) 4.19% 3) New York NY Ind Dev Auth Ser94 6.125% (01/01/24) 3.82% 4) Adams Cnty MS Environ Impt Pcr 6.250% (09/01/23) 2.46% 5) Harris Cnty FSA 5.125% (08/15/32) 2.44% 6) Mass Hlth & Ed Fac Auth Ycn 8.880% (07/01/18) 2.42% 7) Miami Dade Cnty Fl 5.000% (04/01/24) 1.97% 8) Gulfport MS Hosp Fin Auth 5.750% (07/01/31) 1.97% 9) Ohio St Wtr Dev Auth AMT 6.450% (09/01/20) 1.94% 10) New Jersey St Ed Fac Ser 02a R 9.152% (09/01/21) 1.85% Industry/Sector Breakdown Portfolio% General Obligation 17.27% Hospital/Health Care 15.90% Cop/Lease Rental 10.31% Water/SWR 8.05% Housing-Rental Units 5.91% Utility 5.54% Student Loan 4.63% Special Tax 4.45% Miscellaneous 4.30% Higher Education 3.57% Airport Facility 3.50% Continuing Care Facility 3.26% Housing-Mortgages 3.21% Transportation 3.03% Education 2.90% Resource Recovery/Solid Waste 2.70% Housing 0.72% Industrial 0.54% Corporate Airline 0.21% Total: 100.00% Holdings by State Portfolio% Florida 11.68% Texas 9.81% California 9.37% Massachusetts 6.70% New York 6.59% Illinois 6.24% Ohio 5.79% Tennessee 4.63% Mississippi 4.43% New Jersey 4.23% Alaska 4.08% Michigan 3.13% New Mexico 2.91% Alabama 2.77% Pennsylvania 2.54% Wisconsin 2.40% Arizona 1.37% Connecticut 1.37% Rhode Island 1.35% Utah 1.25% Hawaii 1.21% Colorado 1.14% North Dakota 1.11% Indiana 1.09% Nevada 1.01% Washington 0.72% Minnesota 0.58% North Carolina 0.50% Total 100.00% Credit Quality Breakdown Portfolio% AAA 54.11% AA 18.50% A 15.79% BBB 9.92% BB 1.68% Total 100.00% Portfolio Statistics AMT Percentage: 25.41% Average Coupon: 5.55% Percentage of Leverage: Bank Loans: 0% Investment Operations: 0% Preferred Stock: 41.38%* Total: 41.38% Avg. Maturity: 22.68 Years Duration: 6.03 Years Total Net Assets: $217.6 Million Net Asset Value: $11.45 Number of Holdings: 98 * Represents issued and outstanding preferred stock. The foregoing portfolio characteristics are as of the date indicated and can be expected to change. The Fund is a closed-end U.S.-registered management investment company advised by Alliance Capital Management L. P. DATASOURCE: ACM Municipal Securities Income Fund, Inc. CONTACT: Shareholder Contact for ACM Municipal Securities Income Fund, Inc., 1-800-221-5672 Web site: http://www.alliancecapital.com/

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