AB Government Money Market Portfolio (AEAXX) operates as a government money market mutual fund managed by AllianceBernstein L.P., seeking maximum current income consistent with the preservation of capital and maintenance of liquidity; it invests at least 99.5% of assets in cash, U.S. government securities, fully collateralized repurchase agreements backed by such securities, and related instruments with maturities of 397 days or less, maintaining a weighted average maturity of 60 days or less and targeting a stable $1.00 net asset value. The fund offers Class A shares with a 0.49% expense ratio, daily accrual and monthly payment of dividends reflecting short-term interest rates, and holdings including Treasury repurchase agreements (32%), agency coupon securities (32%), Treasuries (21%), and agency repurchase agreements (15%), serving institutional and retail investors focused on low-risk, high-quality U.S. dollar-denominated money market exposure domiciled in the United States with operations primarily in U.S. markets. Originally launched in 1994 as AB Exchange Reserves and renamed AB Government Exchange Reserves in July 2016 to reflect its government-focused strategy, the fund merged into AB Fixed-Income Shares, Inc. - AB Government Money Market Portfolio effective around 2017, adopting its current 2a-7 compliant, AAA-mf rated structure under management by AllianceBernstein's fixed-income team since 2006.