News Release

Exchange Extends Delivery Period for August 2005 Natural Gas Futures Contract

Mon Aug 29 2005

NEW YORK, N.Y., August 29, 2005 — The New York Mercantile Exchange, Inc., announced today that it would extend the delivery period of its natural gas futures contract for one day, through September 1, 2005. All other contract terms remain unchanged. Also, all September deliveries are to be conducted in compliance with standard NYMEX terms.

The NYMEX delivery committee convened again this afternoon to review the status at the Henry Hub facility in Louisiana with regard to outstanding deliveries on the August 2005 NYMEX Division natural gas futures contracts.

Sabine Pipeline, the operator of the Henry Hub facility, has reported that as of mid–afternoon today, the hub is fully operational. Sabine is confirming nominations at all previously–nominated interconnections at normal rates of flow, and that their prior force majeure notice has been lifted.

In light of these developments, the NYMEX delivery committee recommends the following related to the August 2005 natural gas futures contract deliveries. Consistent with its powers cited in NYMEX rule 220.18 Section (C)(6), which was referenced earlier today, all participants are to immediately resume nominations/deliveries related to any remaining NYMEX obligations for August 2005 natural gas futures deliveries.

Lastly, consistent with the prior notice, ADPs may be conducted in the August 2005 Contract pursuant to NYMEX rule 220.17A.

# # #


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.

Corporate Communications

+1 312 930 3434
Email