THE PHILADELPHIA STOCK EXCHANGE TO BEGIN TRADING THREE NEW OPTIONS ON AUGUST 24

PHILADELPHIA — August 23, 2005- The Philadelphia Stock Exchange (PHLX) announced today that it will begin trading three new options beginning August 24.

Momenta Pharmaceuticals (QMP/MNTA)(option/stock symbol:QMP) will trade on the March expiration cycle with initial expiration months September, October, December, and March. Position and exercise limits have been set at 75,000 contracts. The option was allocated to Market Street Securities.

Expedia, Inc. (UED/EXPE)(option/stock symbol:UED) will trade on the January expiration cycle with initial expiration months September, October, January, and April. Position and exercise limits have been set at 75,000 contracts. The option was allocated to Citigroup Derivatives Markets.
Advanced Analogic Technologies Inc. (option/stock symbol:QIH/AATI) will trade on the March expiration cycle with initial expiration months September, October, December, and March. Position and exercise limits have been set at 25,000 contracts. The option was allocated to LaBranche Structured Products, LLC.

The Philadelphia Stock Exchange was founded in 1790. The PHLX trades 2,000 stocks, 1,703 equity options, 25sectors index options and currency options and futures. For more information about the PHLX and its products, visit www.phlx.com

###