OneChicago Reports 165% Increase For May 2005 Volume

OneChicago, LLC today reported that 258,564 contracts traded at the Exchange in May, an increase of 165% over May 2004 trading volume and the fourth consecutive month of year-over-year volume increases. Average daily volume in May was 12,313 contracts. Year-to-date 2005 volume is 91% ahead of the same period in 2004.

Each single stock futures contract is equivalent to 100 shares of the underlying stock or exchange-traded fund. The top five single stock futures contracts by volume in May were:

• Bank of America Corp. (BAC1C)
• Pfizer (PFE1C)
• Home Depot Inc. (HD1C)
• Exxon Mobil Corp. (XOM1C)
• 3M Co. (MMM1C)

The Exchange lists 171 futures on single stocks, including futures on the DIAMONDS® Trust.

Click here to download May's volume report.

OneChicago is a joint venture of the Chicago Board Options Exchange Incorporated® (CBOE®), Chicago Mercantile Exchange Inc. (CME) and the Chicago Board of Trade (CBOT®). All products are electronically traded on the CBOEdirect® match engine and accessible through the CBOEdirect and GLOBEX® platforms. All security futures can be traded out of either a securities or a futures account. For more information about OneChicago and its products, please access the OneChicago Web site at www.OneChicago.com.