News Release

Exchange to Change Margins on Natural Gas and Related Futures

Fri Feb 24 2006

NEW YORK, N.Y., February 24, 2006 — The New York Mercantile Exchange, Inc., today announced margin changes for its natural gas, NYMEX miNYTM natural gas, Henry Hub swing swap, Henry Hub swaps, and Henry Hub penultimate swap futures contracts, as of the close of business on February 27.

Margins for the first month of the natural gas futures contract will decrease to $7,500 from $9,000 for clearing members, to $8,250 from $9,900 for members, and to $10,125 from $12,150 for customers. The margins on the second month will decrease to $6,500 from $8,000 for clearing members, to $7,150 from $8,800 for members, and to $8,775 from $10,800 for customers. Margins on the third to seventh months will decrease to $6,500 from $7,000 for clearing members, to $7,150 from $7,700 for members, and to $8,775 from $9,450 for customers. The margins on the eighth to 12th months will decrease to $7,500 from $ 8,500 for clearing members, to $8, 250 from $9,350 for members, and to $10,125 from $11,475 for customers.

The margins for the first month of the Henry Hub swap futures and Henry Hub penultimate swap contract will decrease to $1,875 from $2,250 for clearing members, to $2,063 from $2,475 for members, and to $2,531 from $3,038 for customers. Margins on the second month will decrease to $1,625 from $2,000 for clearing members, to $1,788 from $2,200 for members, and to $2,194 from $2,700 for customers. The margins on the third to seventh months will decrease to $1,625 from $1,750 for clearing members, to $1,788 from $1,925 for members, and to $2,194 from $2,363 for customers. The margins on the eighth to 12th months will decrease to $1,875 from $2,125 for clearing members, to $2,063 from $2,338 for members, and to $2,531 from $2,869 for customers.

Margins for the first month of the NYMEX miNYTM natural gas futures contract will decrease to $1,875 from $2,250 for clearing members, to $2,063 from $2,475 for members, and to $2,531 from $3,038 for customers. Margins on the second month will decrease to $1,625 from $2,000 for clearing members, to $1,788 from $2,200 for members, and to $2,194 from $2,700 for customers.

The margins for the first month of the Henry Hub swing swap futures contract will decrease to $1,875 from $2,250 for clearing members, to $2,063 from $2,475 for members, and to $2,531 from $3,038 for customers.

# # #


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: Brenda Guzman , 212-299-2436

Corporate Communications

+1 312 930 3434
Email