THE PHILADELPHIA STOCK EXCHANGE TO BEGIN TRADING THREE NEW INDEXES ON WEDNESDAY, JULY 11

PHILADELPHIA — July 10, 2007 - The Philadelphia Stock Exchange (PHLX) announced today that it will begin to trade three new indexes on July 11, 2007. The following two indexes were allocated to Market Street Securities:

PHLX Medical Devices Index – Components and Specifications (option/stock symbol: MXZ) will trade on the March expiration cycle with initial expiration months of July, August, September and December. Position and exercise limits have been set at 31,500 contracts.

PHLX Sports Index – Components and Specifications (option/stock symbol: SXP) will trade on the March expiration cycle with initial expiration months of July, August, September and December. Position and exercise limits have been set at 31,500 contracts.

The final index was allocated to Susquehanna Investment Group:

PHLX Chemicals Index – Components and Specifications (option/stock symbol: XCM) will trade on the March expiration cycle with initial expiration months of July, August, September and December. Position and exercise limits have been set at 31,500 contracts.

The Philadelphia Stock Exchange was founded in 1790. The PHLX trades over 7,000 stocks, 2,543 equity options, 20 sectors index options and currency options and futures. For more information about the PHLX and its products, visit www.phlx.com.