A federal judge in Los Angeles last week denied a motion by Bank of Americas Countrywide Financial unit to dismiss securities fraud claims by the Federal Housing Finance Agency on behalf of Fannie Mae and Freddie Mac for toxic MBS purchased by the government-sponsored enterprises.The FHFAs complaint alleges that Fannie and Freddie purchased approximately $26.6 billion in residential MBS that Countrywide sold from Aug. 30, 2005, to Jan. 23, 2008. The agency alleges negligent misrepresentations and fraud related to the offerings of Countrywide MBS.