Fannie Mae and Freddie Mac picked the low-hanging fruit first and sold large chunks of their most liquid less-liquid assets during the third quarter of 2013 as the government-sponsored enterprises continued to shift their business away from retained investments. The GSEs reduced their combined holdings of commercial MBS by 32.1 percent during the third quarter, according to a new Inside MBS & ABS analysis of their retained portfolios. The Federal Housing Finance Agency has directed the two companies to accelerate their portfolio trimming by focusing on less-liquid assets other than their own MBS. The commercial MBS market has been...[Includes one data chart]