Fannie Mae and Freddie Mac saw a modest decline in production of new single-family mortgage-backed securities at the end of 2014, but a rally in refinance lending softened the thud. The two government-sponsored enterprises securitized $179.38 billion of single-family MBS during the fourth quarter of last year, according to a new Inside Mortgage Finance analysis of loan-level data. That was down 2.1 percent from the third quarter of 2014. But the GSEs securitized...[Includes three data charts]