MF Global's primary regulator the CME group, is under scrutiny by the CFTC for its role in the dissapperaance of customer money from the firm.  The regulator which is leading the government investigation of MF Global is reviewing whether CME’s efforts to verify the safety of customer money were sufficient, the people said.

 Authories are also questioning why the CME appeared to be slow to respond to the crisis enveloping MF Global in the week before its bankruptcy. The publicly traded exchange did not dispatch employees to MF Global’s Chicago headquarters until Oct. 27, three days after Moodys cut its rating on the brokerage firm, sending it into a tailspin. When CME officials arrived at MF Global, they reviewed the firm’s latest statements of customer accounts to ensure client money was safe. Documents indicated the money was secure, the CME said. But then the money vanished, and CME pointed the finger at MF Global.  The exchange said that MF Global might have shifted client money “in a manner that may have been designed to avoid detection.”  But CME never completed an audit, a point officials later conceded when pressed by lawmakers. Instead, CME said it was a spot audit, though they did not complete that either. CME was unable to verify the customer accounts because MF Global did not hand over needed information corroborating the account statements, according to a submission it made to Congress.  But that did not stop exchange officials from heading home for the weekend at about 6 p.m., Friday, Oct. 28.  The officials did not return until that Sunday afternoon, after an apparent shortfall in customer money was discovered.