Mae is an acronym for three government-sponsored enterprises (GSEs): Sallie Mae, Fannie Mae, and Ginnie Mae. Sallie Mae is a publicly traded financial services company that provides student loans and other banking products. Fannie Mae is a government-sponsored enterprise that provides mortgage financing and other services to lenders and borrowers. Ginnie Mae is a government-sponsored enterprise that guarantees the timely payment of principal and interest on mortgage-backed securities. All three of these GSEs are important players in the US housing market.