Nonbanks gained more ground in Fannie/Freddie mortgage servicing during the fourth quarter of 2015, according to a new Inside The GSEs analysis of agency mortgage-backed securities disclosures.Non-depository institutions provided the servicing for some $1.327 trillion of Fannie and Freddie single-family MBS outstanding as of the end of last year. That was up 3.8 percent from the third quarter and represented a hefty 10.1 percent gain from the end of 2014. Banks, thrifts and credit unions were still the dominant GSE servicers, accounting for 67.9 percent of the market at the end of December 2015. But their $2.803 trillion of Fannie/Freddie servicing was down 1.2 percent from...