Judge Rosemary Collyer of the U.S. District Court in Washington, DC, has rebuffed the Federal Deposit Insurance Corp.’s effort to dismiss a $10 billion lawsuit filed by a unit of Deutsche Bank AG over pools of mortgage loans made by Washington Mutual that later went bad. Deutsche Bank, as trustee for the securitized pools at issue, filed suit against the FDIC as well as JPMorgan Chase, arguing that one or the other should be liable for losses suffered by the pool from WaMu’s allegedly fraudulent or poorly underwritten residential mortgages. The trusts involved had been investigated by a Senate subcommittee, which revealed that internal reviews performed by WaMu had determined that “loans marked as containing fraudulent information had nevertheless been securitized and sold to investors.”