The Federal Housing Finance Agency has settled its second mortgage-backed securities lawsuit in its massive litigation effort against non-agency MBS issuers and underwriters that sold to Fannie Mae and Freddie Mac. Citigroup last week agreed to pay damages to settle allegations that the investment bank sold $3.5 billion of faulty MBS to the two GSEs in the years leading up to the financial crisis. The FHFA filed suit during the summer of 2011 against 18 financial institutions, including Citi, alleging violations of the federal Securities Act of 1933.