The New York Mercantile Exchange halted trading Monday for any trader using MF Global as a clearinghouse, traders on the Nymex floor said.

Three floor traders that use MF as a clearinghouse were told they can't place any trades until they find another brokerage that is able to back those transactions.

"We got a bunch of guys here who aren't allowed to trade or allowed to trade customer orders for themselves," said Joseph Santagata, an independent floor broker at RJM Energy. "Anybody MF Global or anybody affiliated with MF cannot trade."

CME Group Inc. (CME), owner of Nymex, was not immediately available to comment.

-By Jerry A. DiColo and Dan Strumpf, Dow Jones Newswires; 212-416-2155; jerry.dicolo@dowjones.com

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