Among the government-sponsored enterprises’ holdings of nonprime mortgages, non-agency mortgage-backed securities are declining much more quickly than purchased/guaranteed mortgages, according to an analysis by Inside Nonconforming Markets. The combined nonprime MBS holdings of Fannie Mae and Freddie Mac declined by 9.6 percent during the first quarter of 2016 compared with the end of 2015. The GSEs’ combined purchased/guaranteed holdings of subprime mortgages and Alt A mortgages declined by 4.1 percent in that time. Similar trends are evident on a yearly basis. MBS account...