Delinquencies are declining in the government-sponsored enterprises’ holdings of Alt A mortgages but outsized losses from the loans remain an issue. Purchased and guaranteed Alt A mortgages account for the largest portion of the GSEs’ remaining involvement in the nonprime market, according to an analysis by Inside Nonconforming Markets. Fannie Mae held $109.70 billion in purchased/guaranteed Alt A mortgages as of the end of the second quarter of 2015 ... [Includes one data chart]