The Philadelphia Stock Exchange To Begin Trading Seven New Options On Wednesday, October 17

The Philadelphia Stock Exchange (PHLX) announced today that it will begin to trade seven new options on October 17, 2007. The following four options were allocated to Citadel Derivatives Trading Group, LLC:

WuXi PharmaTech Cayman, Inc. (option/stock symbol: WX) will trade on the March expiration cycle with initial expiration months of October, November, December and March. Position and exercise limits have been set at 75,000 contracts.

TeraData Corporation (option/stock symbol: TDC) will trade on the January expiration cycle with initial expiration months of October, November, January and April. Position and exercise limits have been set at 75,000 contracts.

Perfect World Company, Ltd. (option/stock symbol: QOP/PWRD) will trade on the March expiration cycle with initial expiration months of October, November, December and March. Position and exercise limits have been set at 75,000 contracts.

Athenahealth, Inc. (option/stock symbol: QJN/ATHN) will trade on the March expiration cycle with initial expiration months of October, November, December and March. Position and exercise limits have been set at 25,000 contracts.

The following two options were allocated to Timber Hill Inc.: Aecom Technology Corporation (option/stock symbol: ACM) will trade on the March expiration cycle with initial expiration months of October, November, December and March. Position and exercise limits have been set at 75,000 contracts.

Sirona Dental Systems, Inc. (option/stock symbol: UDO/SIRO) will trade on the March expiration cycle with initial expiration months of October, November, December and March. Position and exercise limits have been set at 50,000 contracts.

The final option was allocated to Susquehanna Investment Group: China Finance Online Co. LTD (option/stock symbol: JQI/JRJC) will trade on the March expiration cycle with initial expiration months of October, November, December and March. Position and exercise limits have been set at 250,000 contracts.

PHLX currently lists options on 17 sectors, among them are: KBW Bank Index (BKX^SM); KBW Mortgage Finance Index (MFX^SM); KBW Regional Banking Index (KRX^SM); PHLX Drug Sector^SM (RXS^SM); PHLX Gold/Silver Sector^SM (XAU^SM); PHLX Oil Service Sector^SM (OSX^SM); PHLX Defense Sector^SM (DFX^SM); TheStreet.com Internet Sector (DOT^SM); PHLX Semiconductor Sector^SM (SOX^SM); PHLX Utility Sector^SM (UTY^SM); PHLX Housing Sector^SM (HGX^SM); SIG Coal Producers Index™ (SCP^SM); SIG Oil & Exploration Index™ (EPX^SM); and the SIG Steel Producers Index™ (STQ^SM); and Hapoalim American Israeli Index™ (HAI).

The Philadelphia Stock Exchange was founded in 1790. The PHLX trades more than 7,000 stocks, 2,520 equity options, 17 sectors index options, options on all major currencies, and futures through its subsidiary, The Philadelphia Board of Trade (PBOT). For more information about the PHLX and its products, visit www.phlx.com.

SIG Investment Managers Index™ is a trademark of Susquehanna Indices, LLP.

SMQ^SM is a service mark of the Philadelphia Stock Exchange.The PHLX trades iShares FTSE/Xinhua China 25 Index Fund (FXI^SM). This is the first time investors in the United States and abroad are able to track the performance of the largest and most widely traded Chinese stocks by mirroring the FTSE/Xinhua China 25 Index, which captures the top Chinese stocks available to international investors by total market capitalization.SIG Casino Gaming Index, SIG Semiconductor Capital Equipment Index™ and SIG Semiconductor Device™ Index are trademarks of SIG Indices, LLLP. SGVSM, SEZ^SM and SDL^SM are service marks of the Philadelphia Stock Exchange, Inc.