A U.S. district court judge in New York has certified a class of investors to move forward with mortgage-related fraud claims they have brought against three large banks. MBS investors led by plaintiff New Jersey Carpenters Health Fund sued units of Wells Fargo that were acquired from Wachovia Capital Markets, Royal Bank of Scotland and Deutsche Bank that helped underwrite $7.7 billion of MBS issued by failed subprime lender NovaStar Mortgage. The plaintiffs accused...