News Release

NYMEX to Change Margins for Electricity Futures Contract

Fri Jul 14 2006

NEW YORK, NY, July 14, 2006 — The New York Mercantile Exchange, Inc. today announced margin changes for its NYISO Zone J LBMP peak electricity swap futures contract on NYMEX ClearPort®, beginning at the close of business on July 17.

Margins for the first month will increase to $3,500 from $3,000 for clearing members, to $3,850 from $3,300 for members, and to $4,725 from $4,050 for customers. Margins for all other months will increase to $5,500 from $5,000 for clearing members, to $6,050 from $5,500 for members, and to $7,425 from $6,750 for customers.

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