U.S. sues Bank of America over sale of $850 million in mortgage-backed securitiesThe U.S. government filed two civil lawsuits against Bank of America for… (Brendan McDermid/Reuters ) Traders at Bank of America willfully misled investors about the quality of the residential mortgages tucked into the securities the bank sold at the start of the financial crisis, according to separate lawsuits filed Tuesday by the Justice Department and the Securities and Exchange Commission.