PHLX.COM * NEWS RELEASE

PHILADELPHIA — October 17, 2007 -The Philadelphia Stock Exchange (PHLX) announced today that it will begin to trade two additional new options on October 18, 2007. Both options were allocated to Group One Ltd:

Cleveland BioLabs, Incorporated (option/stock symbol: UDC/CBLI) 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 250,000 contracts.
Power Integrations, Inc. (option/stock symbol: UIJ/POWI) 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 25,000 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 over 7,000 stocks, 2,639 equity options, 17 sectors index options and currency options and futures. 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.

THE PHILADELPHIA STOCK EXCHANGE TO BEGIN TRADING TWO ADDITIONAL NEW OPTIONS ON THURSDAY, OCTOBER 18