The supply of single-family MBS outstanding grew again in the third quarter of 2015, according to a new Inside MBS & ABS analysis. At the end of September, $6.381 trillion of single-family MBS were outstanding, a 0.7 percent increase from the second quarter. The market has moved in fits and starts since the end of 2009, but the September mark was the highest since the third quarter of 2013. The supply of non-agency MBS in the market has moved...[Includes two data tables]