Federal National Mortgage Association Fannie Mae is a government-sponsored enterprise (GSE) chartered by the United States Congress to support liquidity and stability in the secondary mortgage market, where mortgage-related assets are purchased and sold. The Company�s activities include providing market liquidity by securitizing mortgage loans originated by lenders in the primary mortgage market into Fannie Mae mortgage-backed securities (Fannie Mae MBS), and purchasing mortgage loans and mortgage-related securities in the secondary market for its mortgage portfolio. Fannie Mae operates in three business segments: Single-Family business, Multifamily Business (formerly Housing and Community Development (HCD)) and Capital Markets group. Its Single-Family Credit Guaranty and Multifamily businesses work with its lender customers to purchase and securitize mortgage loans customers deliver to the Company into Fannie Mae MBS.