The Federal Housing Finance Authority (FHFA) has issued final rules that which will bar the mortgage-finance giants from purchasing mortgage-backed securities (MBS) to meet their affordable-housing goals. These rules are a part of the rules which were proposed earlier this year by the FHFA. The main aim of this new rules are to give the companies greater flexibility to satisfy the government mandates so that they can serve low-income homeowners without taking on additional risks.