News Release

Exchange to Change Margins for Natural Gas, Related Futures Contracts

Thu Jan 26 2006

NEW YORK, N.Y., January 26, 2006 — The New York Mercantile Exchange, Inc., today announced margin changes for its natural gas futures, Henry Hub swap futures, Henry Hub penultimate swap futures, and NYMEX miNYTM natural gas futures contracts at the close of business tomorrow.

The margins on the second month of the natural gas futures contract will decrease to $8,000 from $9,000 for clearing members, to $8,800 from $9,900 for members, and to $10,800 from $12,150 for customers. Margins for the third to eighth months will increase to $7,000 from $6,500 for clearing members, to $7,700 from $7,150 for members, and to $9,450 from $8,775 for customers. Margins for the ninth to 13th months will increase to $8,500 from $7,000 for clearing members, to $9,350 from $7,700 for members, and to $11,475 from $9,450 for customers. Margins for the 14th month will increase to $5,500 from $4,500 for clearing members, to $6,050 from $4,950 for members, and to $7,425 from $6,075 for customers. Margins for all other months will remain unchanged.

The margin rates on the second month of the Henry Hub swap and Henry Hub penultimate swap futures contracts will decrease to $2,000 from $2,250 for clearing members, to $2,200 from $2,475 for members, and to $2,700 from $3,038 for customers. Margins for the third to eighth months will increase to $1,750 from $1,625 for clearing members, to $1,925 from $1,788 for members, and to $2,363 from $2,194 for customers. Margins for the ninth to 13th months will increase to $2,125 from $1,750 for clearing members, to $2,338 from $1,925 for members, and to $2,869 from $2,363 for customers. Margins for the 14th month will increase to $1,375 from $1,125 for clearing members, to $1,513 from $1,238 for members, and to $1,856 from $1,519 for customers. Margins on all other months will remain unchanged.

Margins for the second month of the NYMEX miNYTM natural gas futures contract will decrease to $2,000 from $2,250 for clearing members, to $2,200 from $2,475for members, and to $2,700 from $3,038 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: Anu Ahluwalia , 212-299-2439

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