News Release

CBOT 2-Yr. T-Note Futures Set Open Interest Record

Thu May 11 2006

For Immediate Release

Media Contact:
Craig Grabiner
(312) 341-5758                                                                                                         

CBOT Two-Year Treasury Note Futures Surpass 600,000 Contracts, Set Open Interest Record
Contract Reaches New OI High Mark for Tenth Consecutive Trading Session

CHICAGO, May 11, 2006 – The Chicago Board of Trade (CBOT) announced today that on May 10, 2006, open interest in its Two-Year U.S. Treasury Note futures contract reached a new high for the tenth straight trading session, surpassing the 600,000 contract mark for the first time.  Open interest expanded to 607,802 contracts, compared with the prior day’s record of 588,177 contracts.

Open interest represents the number of trading positions that have not yet been offset and closed at the end of a trading day.

Yesterday’s open interest total in Two-Year Treasury Notes increased by more than 80 percent compared with the same date in the prior year.  During the first four months of 2006, average daily volume of CBOT Two-Year Treasury Note futures was 130,531 contracts, an increase of approximately 73 percent from the same period in 2005.

The Exchange set numerous additional open interest records on May 10, including new highs in the 100 percent electronically-traded Metals futures and options complex, as well as Corn futures, Wheat futures and Soybean Crush options.

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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


Forward Looking Statements
In this release, our use of the words “may,” “should,” “could,” “expects,” “plans,” “anticipates,” “believes,” “predicts,” “potential” or “continue” or other comparable terminology is intended to identify forward-looking statements.  These statements are not guarantees of future performance and involve risks, uncertainties and assumptions that are difficult to predict.  Therefore, actual outcomes and results may differ materially from what is expressed or implied in any forward-looking statements.  More detailed information about factors that may affect our performance may be found in filings made by CBOT Holdings with the Securities and Exchange Commission, which can be obtained at its website at We undertake no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise.

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