Fannie Mae and Freddie Mac had a stellar year for their risk-sharing transactions in 2014, selling off portions of the credit risk associated with $369.7 billion of MBS, greater than four times the $84.7 billion amount seen in the prior year, according to Fitch Ratings. Meanwhile, “performance of the transactions remains exceptionally clean,” analysts at Fitch said in a new report this week. The performance seen in 2013 was based...