By Emmanuel Olaoye and Christopher Elias

NEW YORK/LONDON, Dec. 21 (Thomson Reuters Accelus) - The bankruptcy trustee for collapsed U.S. brokerage firm MF Global Inc. is looking into how the firm re-pledged customer collateral as part of its search for $1.2 billion of missing customer funds.

The practice, called re-hypothecation, has drawn renewed scrutiny after the failure of MF Global and experts said U.S. regulators may face new restrictions as part of efforts to increase protection on customer accounts. (more…)