Depository institutions still have responsibility for most agency mortgage servicing, but nonbanks continued to gain share during the second quarter, according to a new Inside Mortgage Finance analysis of agency mortgage-backed securities data. As of the end of June, nonbanks serviced $2.887 trillion of single-family loans in MBS pools is-sued by Fannie Mae, Freddie Mac and Ginnie Mae. That was up 2.8 percent from March and represented ... [Includes two data charts]