The Philadelphia Stock Exchange To Begin Trading Four New Options On Tuesday, June 24

The Philadelphia Stock Exchange (PHLX) announced today that it will begin to trade four new options on June 24, 2008. These options were allocated to Citadel Derivatives Group LLC:

IShares MSCI Taiwan Index Fund (option/stock symbol: EWT) will trade on the March expiration cycle with initial expiration months of July, September, August and December. Position and exercise limits have been set at 25,000,000 shares.

Companhia de Saneamento Basico (option/stock symbol: SBS) will trade on the January expiration cycle with initial expiration months of July, August, October and January. Position and exercise limits have been set at 7,500,000 shares.

Sociedad Quimica Y Minera de Chile sa (option/stock symbol: SQM) will trade on the January expiration cycle with initial expiration months of July, August, October and January. Position and exercise limits have been set at 20,000,000 shares.

Ultrashort Real Estate Proshares (option/stock symbol: SRS) will trade on the January expiration cycle with initial expiration months of July, August, October and January. Position and exercise limits have been set at 25,000,000 shares.

The Philadelphia Stock Exchange was founded in 1790. The PHLX trades over 7,000 stocks, over 2,600 equity options, 15 sectors index options and currency options and futures. For more information about the PHLX and its products, visit www.phlx.com.