With the Federal Housing Finance Agency working on a common securitization platform for Fannie Mae and Freddie Mac, market participants are beginning to ask whether the residential finance sector really needs two government-sponsored enterprises. This week, at a policy forum in Washington, MBS co-inventor Lewis Ranieri and former GSE regulator James Lockhart suggested that the industry doesn’t need both Fannie and Freddie. The thinking is that a common securitization platform will facilitate the transition to a standardized GSE MBS, with slight variations, that would eliminate the current pricing differentials between Fannie and Freddie MBS. Speaking at the Bipartisan Policy Center, Lockhart noted...