The Philadelphia Stock Exchange To Begin Trading One New Option On Monday, August 6, 2007

The Philadelphia Stock Exchange (PHLX) announced today that it will begin to trade one new option on August 6, 2007. The following option was allocated to Citadel Derivatives Trading Group, LLC:

Orbitz Worldwide, Inc. (option/stock symbol: OWW) will trade on the February expiration cycle with initial expiration months of August, September, November and February. Position and exercise limits have been set at 50,000 contracts.

The Philadelphia Stock Exchange was founded in 1790. The PHLX trades over 7,000 stocks, 2,502 equity options, 19 sectors index options and currency options and futures. For more information about the PHLX and its products, visit www.phlx.com.