The recognition that money was missing scuttled at the 11th hour an agreement to sell a major part of MF Global to a rival brokerage firm. MF Global had staked its survival on completing the deal. Instead, the New York-based firm filed for bankruptcy on Monday.
Regulators are examining whether MF Global diverted some customer funds to support its own trades as the firm teetered on the brink of collapse.
The discovery that money could not be located might simply reflect sloppy internal controls at MF Global. It is still unclear where the money went.