Fannie Mae and Freddie Mac continued to whittle away at their retained mortgage portfolios during the second quarter, keeping up a focus on shedding less-liquid assets. The two government-sponsored enterprises held a combined $637.0 billion of mortgage loans and mortgage securities at June 30, down 17.6 percent from a year ago. Under the current terms of their conservatorship, Fannie and Freddie are required to reduce their mortgage portfolios by at least 15.0 percent a year. By the beginning of 2018, each GSE portfolio is expected...[Includes one data table]