The agency residential MBS market expanded for the third consecutive quarter during the three months ending in September, according to a new Inside MBS & ABS analysis. A total of $5.39 trillion of single-family MBS issued by Fannie Mae, Freddie Mac and Ginnie Mae were outstanding as of the end of the third quarter of 2012. That was up by a scant 0.2 percent from the previous period, although it was still 0.4 percent below the level at the same time in 2011. Both Ginnie (2.1 percent) and Fannie (0.6 percent) posted...[Includes two data charts]