News Release

Exchange to Introduce Three New Natural Gas Basis Futures Contracts

Thu Sep 08 2005

NEW YORK, N.Y., September 8, 2005 —The New York Mercantile Exchange, Inc., announced today that it will introduce three additional natural gas basis futures contracts on its NYMEX ClearPortsm electronic trading and clearing platform beginning on September 11 for the September 12 trade date.

The futures contracts are based on the differential between the prices reported by Platts Inside FERC Gas Market Report and the Exchange floor-traded natural gas futures contract. The new contracts and their trading symbols are: Sonat basis futures (SZ), FGT Zone 3 basis futures, and Transco Zone 4 basis futures.

The contract units will be 2,500 million British thermal units (mmBtu), and the minimum price fluctuation will be $0.0025 per mmBtu. Contracts will be listed for 36 consecutive months, beginning with the October 2005 contract.

Fees for transactions submitted for clearing on NYMEX ClearPortsm will be $0.54 per contract for members and $0.67 for non–members. For trading on NYMEX ClearPortsm , liquidity providers will receive $0.25 per contract, and the participant on the other side of the trade will pay an all–inclusive fee of $0.65. Fees for cash settlement will be $0.54 for members and $0.67 for non–members.

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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.

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