News Release

Exchange to Increase Margins on Two NYMEX ClearPort® Futures Contracts

Wed Apr 19 2006

NEW YORK, N.Y., April 19, 2006 — The New York Mercantile Exchange, Inc., today announced margin changes for its European jet CIF Northwest Europe vs. gasoil futures swap and PJM western hub LMP peak monthly futures contracts, as of the close of business on April 20.

The margins on the European jet CIF Northwest Europe futures contract will increase to $5,000 from $2,800 for clearing members, to $5,500 from $3,080 for members, and to $6,750 from $3,780 for customers.

Margins for the first through 16th months of the PJM western hub LMP peak monthly futures contract will remain unchanged. Margins on all other months will increase to $3,000 from $2,000 for clearing members, to $3,300 from $2,200 for members, and to $4,050 from $2,700 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

Corporate Communications

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