Banks and thrifts held a combined $1.535 trillion of residential MBS at the end of September, a modest 0.6 percent increase from the previous quarter, according to a new Inside MBS & ABS analysis of bank call reports. Bank MBS holdings had spiked higher in the first quarter of this year, only to fall back in the following period. Compared to a year ago, the industry’s aggregate MBS portfolio was up 1.4 percent. Bank and thrift MBS holdings first crossed...[Includes two data charts]