Nonbanks continued to gain ground in the GSE servicing market during the first quarter of 2018 despite some significant declines at several top companies. Nonbanks serviced $1.750 trillion of single-family loans tied to Fannie Mae and Freddie Mac mortgage-backed securities as of the end of March, a new Inside The GSEs analysis reveals. That was up 1.8 percent from December and a stunning 15.7 percent from March 2017. The nonbank share of GSE servicing edged up to 37.5 percent. Depository institutions – banks, thrifts and credit unions – saw a modest gain in aggregate GSE servicing during the first three months of 2018, but their combined market share fell to 58.7 percent.