News Release

Exchange to Change Margins Copper Futures Contracts

Fri Dec 02 2005

NEW YORK, N.Y., December 2, 2005 — The New York Mercantile Exchange, Inc., today announced that it will increase the December 2005 and January and February 2006 margins for its copper futures contracts, effective at the close of business on December 5.

Margins for clearing and non–clearing members will increase to $2,750 from $2,250, and margins for customers will increase to $3,713 from $3,038.

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