News Release

Exchange to Change Margins on Natural Gas Futures and Other Related Contracts

Fri Jun 17 2005
NEW YORK, N.Y., June 17, 2005 — The New York Mercantile Exchange, Inc., announced today that it will change the margins on its natural gas futures, Henry Hub natural gas swap futures, e-miNYsm natural gas futures, Henry Hub natural gas penultimate swap futures, and Henry Hub natural gas swing swap futures contracts at the close of business on June 21.

The margins on the first and second nearby months of the natural gas futures contract will increase to $5,000 from $4,500 for clearing members, to $5,500 from $4,950 for members, and to $6,750 from $6,075 for customers.

Margins on the third through sixth nearby months will increase to $5,000 from $4,000 for clearing members, to $5,500 from $4,400 for members, and to $6,750 from $ 5,400 for customers. Margins for all other months will remain unchanged.

The margins on the first and second nearby months of the Henry Hub natural gas swap futures contract will increase to $1,250 from $1,125 for clearing members, to $1,375 from $1,238 for members, and to $1,688 from $1,519 for customers.

Margins on the third through sixth nearby months will increase to $1,250 from $1,000 for clearing members, to $1,375 from $1,100 for members, and to $1,688 from $1,350 for customers. Margins for all other months will remain unchanged.

Margins on both listed months of the e-miNYsm natural gas futures contract will increase to $2,500 from $2,250 for clearing members, to $2,750 from $3,475 for members, and to $2,375 from $3,038 for customers.

Margins on the spot month of the Henry Hub natural gas swing swap futures contract will increase to $1,250 from $1,125 for clearing members, to $1,375 from $1,238 for members, and to $1,688 from $1,519 for customers.

Margins on the first and second nearby months of the Henry Hub natural gas penultimate swap futures contract will increase to $1,250 from $1,125 for clearing members, to $1,375 from $1,238 for members, and to $1,688 from $1,519 for customers.

Margins on the third through sixth nearby months will increase to $1,250 from $1,000 for clearing members, to $1,375 from $1,100 for members, and to $1,688 from $1,350 for customers. Margins for all other months will remain unchanged.
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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.

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