News Release

CBOT 100 oz Gold Futures Surpass 60% Market Share

Tue Jul 04 2006

For Immediate Release

Media Contact:
Jennifer Rook
312-435-3625
news@cbot.com

CBOT Full-sized Gold Futures Contract Surpass 60 percent Market Share for the First Time in a Single Trading Day
CBOT Full-sized Silver Futures achieves 10,000 contracts in open interest

CHICAGO? October 4, 2006 ? The Chicago Board of Trade (CBOT?) announced today that its Full-sized (100 oz.) Gold futures contract surpassed a market share milestone of

60 percent on October 2, capturing 64 percent of all listed Gold futures traded in North America that day. Open interest in the CBOT?s Full-sized (5,000 oz.) Silver futures grew beyond 10,000 contracts and set a new record of 10,064 contracts yesterday. The previous record was 9,959 contracts set on September 29, 2006.

Average daily volume in the CBOT Gold complex, consisting of Full-sized (100 oz.) Gold futures and options and mini-sized (33 oz.) Gold futures contracts, reached

52,464 contracts during September and achieved a market share of 54 percent of all Gold futures traded in North America for the month.

The CBOT Metals Complex includes Full-sized (100 oz.) Gold futures and options contracts, mini-sized (33 oz.) Gold futures contracts, Full-sized (5,000 oz.) Silver futures and options contracts and mini-sized (1,000 oz.) Silver futures contracts. These products are available for trading 22 hours per day on the e-cbot? electronic trading platform. For more information about the CBOT Precious Metals Complex please visit the Exchange?s web site at www.cbot.com/metals.

About the CBOT
As one of the leading global derivative exchanges, the Chicago Board of Trade provides a diverse mix of financial, equity and commodity futures and options-on-futures products. Building on its 158-year history, the CBOT continues to advance into the future using the strength of deep liquidity, market integrity and member-trader expertise. Using superior trading technology in both electronic and open-auction trading platforms, the CBOT provides premier customer service to risk managers and investors worldwide. For more information, visit our website at www.cbot.com.

Forward Looking Statements
Certain statements in this press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and includes any use of the words ?may,? ?should,? ?could,? ?expects,? ?plans,? ?anticipates,? ?believes,? ?estimates,? ?predicts,? ?potential? or ?continue.? These statements are based on management?s current expectations and involve assumptions that may be subject to change or risks and uncertainties that could cause actual results to differ materially from those set forth in the statements. Accordingly, actual outcomes and results may differ materially from what is expressed or implied in any forward-looking statement contained in this press release. The factors that may affect our performance may be found in the Annual Report on Form 10-K and other periodic reports filed by CBOT Holdings, Inc. with the U.S. Securities and Exchange Commission (?SEC?). These filings can be obtained at the SEC?s website at www.sec.gov. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

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