UBS Americas Inc., several of its subsidiaries, and four former executive officers were sued Wednesday morning in U.S. District court for the Southern District of New York. The Federal Housing Finance Agency (FHFA) brought suit charging violations of securities laws in the sale of private label residential mortgage-backed securities (MBS) to government sponsored enterprises (GSEs) Freddie Mac and Fannie Mae. FHFA sued as conservator of the GSEs and seeks a jury trial in an attempt to recover losses...