News Release

NYMEX to Change Margins for Crude Oil and Related Futures Contracts

Tue Sep 12 2006

NEW YORK, N.Y., September 12, 2006 — The New York Mercantile Exchange, Inc. today announced margin changes for its crude oil and related futures contracts, beginning at the close of business tomorrow.

Margins for the October, November, and December 2006 months of the crude oil (CL), Brent crude oil (SC), and crude oil financial (WS) futures contracts will decrease to $3,000 from $3,500 for clearing members, to $3,300 from $3,850 for members, and to $4,050 from $4,725 for customers.

The margins for the September, October, November, and December 2006 months of the crude oil calendar swap and Brent crude oil calendar swap futures contracts will decrease to $3,000 from $3,500 for clearing members, to $3,300 from $3,850 for members, and to $4,050 from $4,725 for customers.

Margins for the October, November and December 2006 months of the NYMEX miNYTM crude oil futures contract will decrease to $1,500 from $1,750 for clearing members, to $1,650 from $1,925 for members, and to $2,025 from $2,363 for customers.

Margins for the October, November and December 2006 months of the Brent bullet swap (BB), Brent (ICE) calendar swap (CY), and NYMEX Brent swap (BN) futures contracts will decrease to $3,000 from $3,500 for clearing members, to $3,300 from $3,850 for members, and to $4,050 from $4,725 for customers.

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Forward Looking and Cautionary Statements
This press release may contain forward–looking statements within the meaning of the Private Securities Litigation Reform Act, with respect to our future performance, operating results, strategy, and other future events. Such statements generally include words such as could, can, anticipate, believe, expect, seek, pursue, and similar words and terms, in connection with any discussion of future results. Forward–looking statements involve a number of assumptions, risks, and uncertainties, any of which may cause actual results to differ materially from the anticipated, estimated, or projected results referenced in forward–looking statements. In particular, the forward–looking statements of NYMEX Holdings, Inc., and its subsidiaries are subject to the following risks and uncertainties: the success and timing of new futures contracts and products; changes in political, economic, or industry conditions; the unfavorable resolution of material legal proceedings; the impact and timing of technological changes and the adequacy of intellectual property protection; the impact of legislative and regulatory actions, including without limitation, actions by the Commodity Futures Trading Commission; and terrorist activities and international hostilities, which may affect the general economy as well as oil and other commodity markets. We assume no obligation to update or supplement our forward–looking statements.

Contact: Brenda Guzman , 212-299-2436

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