Fannie Mae and Freddie Mac securitized a total of $43.18 billion of single-family mortgages that carried private mortgage insurance during the fourth quarter of 2013, according to a new market analysis and ranking by Inside Mortgage Finance. That was down 25.8 percent from the $58.18 billion of private MI mortgages securitized by the two government-sponsored enterprises in the third quarter of last year. The silver lining was that overall GSE production declined even more, with new GSE mortgage-backed security issuance dropping 36.1 percent from the third to the fourth quarter. Overall, some 23.8 percent of GSE-securitized single-family mortgages had...[Includes two data charts]