U.S. sues UBS, alleges crisis-era mortgage securities fraud

NEW YORK (Reuters) - The U.S. government on Thursday filed a civil fraud lawsuit accusing UBS Group AG , Switzerland's largest bank, of defrauding investors in its sale of residential mortgage-backed securities leading up to the 2008-09 global financial crisis.UBS was accused of misleading investors about the quality of more than $41 billion of subprime and other risky mortgage loans backing 40 securities offerings in 2006 and 2007, the Department of Justice said in a complaint filed with the..