The outstanding supply of agency single-family MBS continued to grow at a subdued pace during the third quarter of 2014, and the biggest investor classes did most of the heavy lifting funding the market, according to a new Inside MBS & ABS analysis. On the supply side, there were $5.632 trillion of single-family MBS guaranteed by Fannie Mae, Freddie Mac and Ginnie Mae outstanding at the end of September. That was up just 0.4 percent from the previous quarter but had enough growth rings to show a 1.2 percent gain from a year ago. As has been the case for the past few years, the Ginnie MBS market grew...[Includes two data chart]