Activity Plunges. Fannie Mae and Freddie Mac securitized just $29.95 billion of single-family mortgages with private mortgage-insurance coverage during the first quarter of 2014, a 30.9 percent decline from the previous period, according to an analysis and ranking by Inside Mortgage Finance, an affiliated publication. The steepness of the private MI downturn was in line with the 29.1 percent downturn in overall business at the two GSEs from the fourth quarter of 2013. And the flow of private MI loans in early 2014 was down 40.2 percent from the first quarter of last year, a less severe drop than the 63.7 swoon in the overall GSE market over that period.