Holdings of subprime and Alt A mortgages by Fannie Mae and Freddie Mac continue to decline, though there’s a sharp divergence in terms of the government-sponsored enterprises’ guarantees of nonprime loans and mortgage-backed securities. The GSEs were exposed to a combined $147.34 billion in purchased/guaranteed nonprime mortgages as of the end of 2015, according to an analysis by Inside Nonconforming Markets ... [Includes one data chart]