The supply of outstanding residential MBS grew by 0.3 percent during the third quarter, hitting $6.383 trillion, according to a new Inside MBS & ABS analysis. The Federal Reserve gobbled up most of the increase. Ginnie Mae remained the fastest-growing MBS product. Its $1.377 trillion in outstanding single-family MBS was up 2.6 percent from the second quarter, and it expanded by 8.1 percent from September 30, 2012. Fannie Mae posted a more modest 0.8 percent increase in single-family MBS outstanding, while the Freddie Mac supply shrank slightly. The non-agency MBS market continued...[Includes two data charts]