NYMEX To Launch U.S. Carbon Allowance Contract As Part Of The Green Exchange™ Venture

The New York Mercantile Exchange, Inc., a subsidiary of NYMEX Holdings, Inc. (NYSE: NMX), today announced that it will introduce a U.S. Regional Greenhouse Gas Initiative (RGGI) carbon allowance futures contract, in the third quarter of 2008, pending regulatory review.

The contract will be available via the CME Globex® electronic trading platform and NYMEX ClearPort® clearing. When launched, this is expected to be the first exchange-traded contract for compliance with a government cap-and-trade program in the U.S.

The Green Exchange venture will offer a comprehensive range of environmental futures, options and swap contracts for markets focused on solutions to climate change, renewable energy and other environmental challenges. The first slate of environmental futures and options contracts were introduced on the NYMEX, the world's largest physical commodities exchange, on March 17.

Additional information the contracts and fees can be found at http://www.greenfutures.com/.

About The Green Exchange™
The Green Exchange initiative was introduced by NYMEX Holdings, Inc. (NYSE: NMX) in December 2007, with Evolution Markets, Morgan Stanley, Credit Suisse, JPMorgan, Merrill Lynch, Goldman Sachs, Tudor Investment, Constellation Energy, Vitol SA, ICAP, and RNK Capital. The new exchange will offer a comprehensive range of environmental futures, options and swap contracts for markets focused on solutions to climate change, renewable energy and other environmental challenges. For further information about The Green Exchange, please visit http://www.greenfutures.com/.