Federal National Mortgage Association provides a source of liquidity to the mortgage market and supports the availability and affordability of housing in the United States. It securitizes mortgage loans originated by lenders into Fannie Mae mortgage-backed securities (Fannie Mae MBS). The company operates in two segments, Single-Family and Multifamily. The Single-Family segment securitizes and purchases single-family fixed-rate or adjustable-rate, first-lien mortgage loans, or mortgage-related securities backed by these loans; and loans that are insured by Federal Housing Administration, loans guaranteed by the Department of Veterans Affairs and Rural Development Housing and Community Facilities Program of the U.S. Department of Agriculture, manufactured housing mortgage loans, and other mortgage-related securities.