Federal and state enforcement agencies late last week launched a broad new initiative to investigate and develop litigation on fraud and misconduct in the non-agency MBS market, issuing civil subpoenas to 11 financial companies. The RMBS Working Group is being co-chaired by five officials: two assistant attorneys general in the Justice Department, the head of enforcement at the Securities and Exchange Commission and state attorneys general from New York and Colorado. Some 55 DOJ officials are participating, including 15 attorneys and 10 Federal Bureau of Investigation agents, with 30 more attorneys...