Commercial banks and savings institutions held a record $1.608 trillion of single-family MBS in portfolio as of the end of the third quarter, according to a new Inside MBS & ABS analysis of call-report data. Banks and thrifts boosted their MBS holdings by 1.6 percent from the end of June, reaching a third consecutive record level. The gain pushed the industry’s market share of single-family MBS to an estimated 25.2 percent. Commercial banks were responsible for ... [Includes two data charts]