News Release

NYMEX Announces Initial Product Slate for Side By Side Trading on CME Globex®

Fri May 19 2006

New York, N.Y., May 19, 2006 — The New York Mercantile Exchange, Inc. today announced the contract specifications for the initial slate of the energy futures contracts that will be offered for side by side trading on CME Globex, the electronic trading platform of the Chicago Mercantile Exchange, on June 11 for trade date June 12.

The full-sized contracts and their commodity codes are: crude oil (penultimate) financial futures (WS); heating oil (penultimate) financial futures (BH); RBOB gasoline (penultimate) financial futures (RT); natural gas (penultimate) financial futures (HP); and natural gas (last-day) financial futures (HH).

The natural gas (penultimate) financial futures and natural gas (last-day) financial futures contracts will be 10,000 million British thermal units (mmBtu) in size with a minimum price fluctuation of $0.001 per mmBtu. The heating oil (penultimate) financial futures and RBOB gasoline (penultimate) financial futures contracts will be 42,000 gallons in size with a minimum price fluctuation of $0.0001 per gallon. The crude oil (penultimate) financial futures will be 1,000 barrels in size with a minimum price fluctuation of $0.01 per barrel.

The natural gas (penultimate) financial futures and natural gas (last-day) financial futures contracts will be listed for 72 consecutive months. The heating oil (penultimate) and the RBOB gasoline (penultimate) financial futures are expected to be available for 36 consecutive months. The crude oil (penultimate) financial futures will be listed for the current year plus five years with a new calendar year added following the termination of the December contract in the current year.

Additionally, the NYMEX miNY™ crude oil (QM), natural gas (QG); heating oil (QH); and RBOB gasoline (QU) futures contracts will be listed on CME Globex. The contracts will be listed for three consecutive months.

All contracts will be available for trading on the CME Globex trading platform from 6:00 PM Sundays through 5:15 PM on Fridays.

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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: Anu Ahluwalia, (212) 299-2439

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