The Philadelphia Stock Exchange To Begin Trading Two New Options On Thursday, April 5

The Philadelphia Stock Exchange (PHLX) announced today that it will begin to trade two new options on April 5, 2007. Both options have been allocated to McGowan Investors, L.P.:

Core Laboratories N.V. (option/stock symbol: CLB) will trade on the March expiration cycle with initial expiration months of April, May, June, September and January. Position and exercise limits have been set at 75,000 contracts.

Alesco Financial, Inc. (option/stock symbol: AFN) will trade on the February expiration cycle with initial expiration months of April, May, August and November. 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, 2,431 equity options, 15 sectors index options and currency options and futures. For more information about the PHLX and its products, visit www.phlx.com.