AllianceBernstein National Municipal Income Fund, Inc is a closed-ended fixed income mutual fund launched and managed by AllianceBernstein L.P. The fund invests in the fixed income markets of the United States. It typically invests in municipal grade bonds rated BAA/BBB or higher. The fund invests in bonds having a long term average maturity period. It benchmarks the performance of its portfolio against the Lehman Brothers Municipal Bond Index. The fund was formerly known as Alliance National Municipal Income Fund Inc. AllianceBernstein National Municipal Income Fund, Inc was formed on January 28, 2002 and is domiciled in the United States.