The Federal Housing Finance Agency’s legal action late last week against many of the nation’s largest financial institutions on the grounds they misled Fannie Mae and Freddie Mac about the quality of subprime and Alt A MBS purchased by the government-sponsored enterprises has few positives but plenty of negative potential consequences for the market, experts say. The 17 separate lawsuits filed by the FHFA seek unspecified damages on $196 billion in mortgage securities the two GSEs purchased, mostly between 2005 and 2008. The agency conducted extensive loan-level reviews that allegedly revealed widespread discrepancies between... [Includes two pages of data]