A surge of new refinance business and a seasonal uptick in purchase-mortgage activity helped lift agency issuance of single-family MBS in April, according to a new Inside MBS & ABS analysis and ranking. Fannie Mae, Freddie Mac and Ginnie Mae produced $108.95 billion of new single-family MBS last month, the strongest monthly output since September 2015. Gross new issuance was up 9.8 percent from March, but on a year-to-date basis, production was still down 3.9 percent from the volume generated in the first four months of 2015. Ginnie saw...[Includes two data tables]