Exhibit 99.1

News Release
20 S. Wacker Drive, Chicago, IL 60606-7499    www.cme.com

FOR IMMEDIATE RELEASE Media Contacts Anita Liskey, 312.466.4613 William Parke, 312.930.3467 news@cme.com   Investor Contact John Peschier,312.930.8491 CME-E

Chicago Mercantile Exchange Holdings Inc. Reports Record Results for 2006

• Record volumes across all product lines drive record 2006 revenues and earnings

• Strong fourth-quarter volumes and revenues drive 35 percent increase in net income to $103 million

• Fourth-quarter FX volume rises 36 percent to average a record 508,000 contracts per day

• Fourth-quarter processing services revenues increase 79 percent to $28 million

CHICAGO, Jan. 30, 2007 – Chicago Mercantile Exchange Holdings Inc. (NYSE, NASDAQ: CME) today reported a 26 percent increase in total revenues to $281 million and a 35 percent increase in net income to $103 million for fourth-quarter 2006 compared with fourth-quarter 2005. Income before income taxes was up 36 percent to $171 million. Diluted earnings per share rose 33 percent to $2.91 from $2.18.

The company also reported record total revenues and earnings for 2006. Total revenues climbed 22 percent to $1.1 billion for the year, compared with $890 million for 2005. Net income rose 33 percent to $407 million, versus $307 million a year ago. Diluted earnings per share increased 32 percent to $11.60 from $8.81 per diluted share in 2005.

“This past year marked the sixth consecutive year of record performance for CME as we continued to grow our business organically – delivering volume growth of 25 percent or more across all product lines – while expanding into new markets and building new alliances,” said CME Executive Chairman Terry Duffy. “Most important, our proposed merger with the Chicago Board of Trade is expected to close midyear, pending shareholder and regulatory approval. This will enable us to serve customers more efficiently and effectively, and in turn further benefit our shareholders, as we position CME more strategically to better compete in the dynamic global marketplace.”

“Successful execution of our growth strategy enabled CME to achieve record revenues and earnings in 2006, with overall volume surging 28 percent to more than 1.3 billion contracts and electronic trading expanding to 75 percent of total volume in the fourth quarter,” said CME Chief Executive Officer Craig Donohue. “Our strong results reflect continued record annual volumes in foreign exchange and interest rate products and greater than expected NYMEX volume on CME Globex, which more than doubled from average daily volume of 175,000 contracts in the third quarter to average daily volume of 370,000 contracts in the fourth quarter.”

All references to volume and rate per contract information in the text of this document exclude our non-traditional TRAKRS products, for which CME receives significantly lower clearing fees than other CME products, CME Auction Markets products and Swapstream products.

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Fourth-Quarter Results

For the fourth quarter of 2006, clearing and transaction fees rose 25 percent to $220 million from $176 million, reflecting a 29 percent increase in average daily volume to 5.3 million contracts for the quarter. The fourth-quarter growth was led by a 36 percent increase in foreign exchange product volume, to a record 508,000 contracts per day. In addition, CME interest rate volume increased 35 percent compared with the same quarter a year ago, averaging 3.0 million contracts per day; CME E-mini products grew 19 percent, averaging 1.6 million contracts per day; and CME commodity products increased by 27 percent with average daily volume of 72,000 contracts.

Processing services, which includes support for the Chicago Board of Trade, NYMEX and OneChicago, generated $28 million in the fourth quarter. This represents a 79 percent increase from $16 million for the same period in 2005. Quotation data fees were $20 million, versus $17 million in fourth-quarter 2005.

Total operating expenses were $123 million for the fourth quarter of 2006. This represents a 15 percent increase from $107 million for the same period in 2005, driven by compensation, professional fees and marketing-related costs. Capital expenditures, including capitalized software development costs, were $29 million for fourth-quarter 2006, compared with $25 million for the final quarter of 2005.

Fourth-quarter income before income taxes was $171 million, an increase of 36 percent from $126 million for the year-ago period. The company’s pre-tax margin was 58 percent, compared with 54 percent for the same period last year. Pre-tax margin is defined as income before income taxes expressed as a percentage of total revenues added to total non-operating income and expense.

CME’s working capital increased by more than $73 million during the fourth quarter, to $1.3 billion at December 31, 2006.

Full-Year 2006 Results

Average daily volume was 5.3 million contracts in 2006, up 28 percent from 4.2 million contracts in 2005. Volume on the CME Globex electronic platform increased 31 percent year over year to an average of 3.8 million contracts per day.

For 2006, revenue from clearing and transaction fees grew 24 percent to $866 million from $696 million a year ago, benefiting from higher trading volume. Processing services increased 31 percent to $90 million from $69 million a year ago.

Total operating expenses were $469 million for 2006, up 14 percent from $412 million for 2005. In 2007, the company expects operating expenses on a stand-alone basis to total $530 to $540 million, which includes a full-year of expenditures related to Swapstream, a European based market-leading multilateral electronic trading platform for interest rate swaps, CBOT merger planning, and costs associated with FXMarketSpace to support the service level agreements in place.

Capital expenditures and capitalized software development costs were $87 million for 2006, primarily due to continued investments in capacity related to volume growth and functionality. In 2007, the company expects capital expenditures to total between $110 and $115 million, on a stand-alone basis, net of leasehold allowances.

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Income before income taxes was $672 million for 2006, compared with $508 million for 2005. The pre-tax margin was 59 percent, compared with 55 percent for the year-earlier period.

For the year 2006, the company paid dividends of $2.52 per common share, totaling $88 million.

During 2006, CME’s working capital grew by $321 million.

CME will hold a conference call to discuss year-end and fourth-quarter results at 8:30 a.m. Eastern Time today. A live audio Webcast of the call will be available on the Investor Relations section of CME’s Web site at www.cme.com. An archived recording will be available for up to two months after the call.

Chicago Mercantile Exchange Holdings Inc. became the first publicly traded U.S. financial exchange on Dec. 6, 2002. The company was added to the S&P 500^® Index on August 10, 2006, and the Russell 1000^® Index on July 1, 2003. It is the parent company of Chicago Mercantile Exchange Inc. (www.cme.com), the largest and most diverse financial exchange in the world. As an international marketplace, CME brings together buyers and sellers on its CME Globex electronic trading platform and on its trading floors. CME offers futures and options on futures primarily in interest rates, equities, foreign exchange and commodities.

The Globe Logo, Chicago Mercantile Exchange^®, CME^®, E-mini^®, Globex^®, Swapstream^® and CME Auction Markets™ are trademarks of CME. Other trade names, service marks, trademarks and registered trademarks that are not proprietary to Chicago Mercantile Exchange Inc. are the property of their respective owners, and are used herein under license. Further information about CME and its products is available on the CME Web site at www.cme.com.

Statements in this news release that are not historical facts are 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. Among the factors that might affect our performance are: our ability to obtain the required approvals for our proposed merger with CBOT Holdings, Inc. and our ability to realize the benefits and control the costs of the proposed transaction; increasing competition by foreign and domestic competitors, including new entrants into our markets; our ability to keep pace with rapid technological developments, including our ability to complete the development and implementation of the enhanced functionality required by our customers; our ability to continue introducing competitive new products and services on a timely, cost-effective basis, including through our electronic trading capabilities, and our ability to maintain the competitiveness of our existing products and services; our ability to adjust our fixed costs and expenses if our revenues decline; our ability to continue to realize the benefits of our transaction processing services provided to third parties; our ability to maintain existing customers and attract new ones; our ability to expand and offer our products in foreign jurisdictions; changes in domestic and foreign regulations; changes in government policy, including policies relating to common or directed clearing; the costs associated with protecting our intellectual property rights and our ability to operate our business without violating the intellectual property rights of others; our ability to generate revenue from our market data that may be reduced or eliminated by the growth of electronic trading; changes in our rate per contract due to shifts in the mix of the products traded, the trading venue and the mix of customers (whether the customer receives member or non-member fees or participates in one of our various incentive programs) and the impact of our tiered pricing structure; the ability of our financial safeguards package to adequately protect us from the credit risk of our clearing firms; changes in price levels and volatility in the derivatives markets and in underlying fixed income, equity, foreign exchange and commodities markets; economic, political and market conditions; our ability to accommodate increases in trading volume without failure or degradation of performance of our systems; our ability to execute our growth strategy and maintain our growth effectively; our ability to manage the risks and control the costs associated with our acquisition, investment and alliance strategy; industry and customer consolidation; decreases in trading and clearing activity; the imposition of a transaction tax on futures and options on futures transactions; and seasonality of the derivatives business. More detailed information about factors that may affect our performance may be found in our filings with the Securities and Exchange Commission, including our most recent Quarterly Report on Form 10-Q, which is available in the Investor Information section of the CME Web site. 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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Chicago Mercantile Exchange Holdings Inc. and Subsidiaries

Consolidated Balance Sheets

(dollars in thousands)

	December 31, 2006		December 31, 2005
ASSETS
Current Assets:
Cash and cash equivalents	$	969,504	$	610,891
Collateral from securities lending		2,130,156		2,160,893
Marketable securities, including pledged securities		250,718		292,862
Accounts receivable, net of allowance		121,128		84,974
Other current assets		37,566		41,675
Cash performance bonds and security deposits		521,180		592,127
Total current assets		4,030,252		3,783,422
Property, net of accumulated depreciation and amortization		168,755		153,329
Other assets		107,498		32,643
Total Assets	$	4,306,505	$	3,969,394
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	25,552	$	23,553
Payable under securities lending agreements		2,130,156		2,160,893
Other current liabilities		78,466		53,354
Cash performance bonds and security deposits		521,180		592,127
Total current liabilities		2,755,354		2,829,927
Other liabilities		32,059		20,783
Total liabilities		2,787,413		2,850,710
Shareholders’ equity		1,519,092		1,118,684
Total Liabilities and Shareholders’ Equity	$	4,306,505	$	3,969,394

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Chicago Mercantile Exchange Holdings Inc. and Subsidiaries

Consolidated Statements of Income

(in thousands, except per share amounts)

	Quarter Ended December 31,						Year Ended December 31,
	2006			2005			2006			2005
Revenues
Clearing and transaction fees	$	219,774		$	176,457		$	866,089		$	696,201
Processing services		27,929			15,562			90,148			68,730
Quotation data fees		20,100			17,370			80,836			71,741
Access fees		5,215			4,743			20,154			18,866
Communication fees		2,047			2,140			8,588			8,964
Other		6,251			6,269			24,132			25,264
Total Revenues		281,316			222,541			1,089,947			889,766
Expenses
Compensation and benefits		53,915			45,469			202,966			179,594
Communications		8,096			8,621			31,580			31,098
Technology support services		7,849			7,124			31,226			26,837
Professional fees and outside services		9,064			7,146			34,290			26,850
Depreciation and amortization		19,191			16,799			72,783			64,917
Occupancy		7,412			7,208			29,614			28,529
Licensing and other fee agreements		6,478			5,829			25,733			17,982
Marketing, advertising and public relations		5,147			3,767			16,740			13,278
Other		5,909			5,191			24,160			23,054
Total Expenses		123,061			107,154			469,092			412,139
Operating Income		158,255			115,387			620,855			477,627
Non-Operating Income and Expense
Investment income		17,003			10,252			55,792			31,441
Securities lending interest income		23,589			19,188			94,028			58,725
Securities lending interest expense		(23,294	)		(18,666	)		(92,103	)		(56,778	)
Equity in losses of unconsolidated subsidiaries		(4,805	)		(419	)		(6,915	)		(2,636	)
Total Non-Operating		12,493			10,355			50,802			30,752
Income Before Income Taxes		170,748			125,742			671,657			508,379
Income tax provision		(68,146	)		(49,462	)		(264,309	)		(201,522	)
Net Income	$	102,602		$	76,280		$	407,348		$	306,857
Earnings per Common Share:
Basic	$	2.95		$	2.21		$	11.74		$	8.94
Diluted		2.91			2.18			11.60			8.81
Weighted Average Number of Common Shares:
Basic		34,812			34,476			34,696			34,315
Diluted		35,199			34,974			35,124			34,839

Note: Beginning in the third quarter of 2006, the following income statement items have been reclassified from revenue to non-operating income and expense in the consolidated statements of income: investment income, securities lending interest income and expense, and equity in losses of unconsolidated subsidiaries. The equity in losses of unconsolidated subsidiaries was previously included as part of other revenues. All other items were included separately in the income statement. The presentation of these items has been changed to more closely conform to the Securities and Exchange Commission’s Article 5 of Regulation S-X.

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	4Q 2005		1Q 2006		2Q 2006		3Q 2006		4Q 2006
Trading Days		63		62		63		63		63
Average Daily Volume (Round Turns, in Thousands)*
	4Q 2005		1Q 2006		2Q 2006		3Q 2006		4Q 2006
Interest rates		2,209		2,918		3,255		3,148		2,990
Equity E-mini		1,336		1,408		1,748		1,564		1,596
Equity standard-size		141		145		173		154		147
Foreign exchange		375		407		471		423		508
Commodities		56		80		81		78		72
Subtotal		4,117		4,958		5,728		5,367		5,313
TRAKRS		595		161		419		117		294
Total		4,712		5,119		6,147		5,484		5,607
Open outcry		1,107		1,467		1,657		1,517		1,293
Electronic (including TRAKRS)		3,556		3,595		4,441		3,917		4,261
Privately negotiated		49		57		49		50		53
Total		4,712		5,119		6,147		5,484		5,607
Transaction Fees (in Thousands)*
	4Q 2005		1Q 2006		2Q 2006		3Q 2006		4Q 2006
Interest rates	$	70,840	$	89,194	$	97,768	$	98,306	$	95,741
Equity E-mini		59,427		62,183		76,889		70,194		71,111
Equity standard-size		12,823		12,859		15,493		12,947		13,271
Foreign exchange		29,442		31,616		33,212		30,576		34,752
Commodities		3,457		4,737		4,673		4,597		4,257
Subtotal		175,989		200,589		228,035		216,620		219,132
TRAKRS		468		208		384		244		344
Total	$	176,457	$	200,797	$	228,419	$	216,864	$	219,476
Open outcry	$	35,677	$	43,406	$	50,067	$	45,429	$	41,710
Electronic (including TRAKRS)		129,088		144,776		166,741		160,295		165,399
Privately negotiated		11,692		12,615		11,611		11,140		12,367
Total	$	176,457	$	200,797	$	228,419	$	216,864	$	219,476
Average Rate Per Contract (RPC)*
	4Q 2005		1Q 2006		2Q 2006		3Q 2006		4Q 2006
Interest rates	$	0.509	$	0.493	$	0.477	$	0.496	$	0.508
Equity E-mini		0.706		0.712		0.698		0.712		0.707
Equity standard-size		1.443		1.431		1.421		1.338		1.430
Foreign exchange		1.246		1.253		1.119		1.146		1.085
Commodities		0.975		0.953		0.921		0.939		0.942
Average (excluding TRAKRS)	$	0.678	$	0.652	$	0.632	$	0.641	$	0.655
TRAKRS		0.012		0.021		0.015		0.033		0.019
Overall average RPC	$	0.594	$	0.633	$	0.590	$	0.628	$	0.621
Open outcry	$	0.512	$	0.477	$	0.480	$	0.475	$	0.512
Electronic (including TRAKRS)		0.576		0.650		0.597		0.652		0.616
Electronic (excluding TRAKRS)		0.690		0.679		0.657		0.668		0.660
Privately negotiated		3.759		3.583		3.785		3.545		3.713
Overall average RPC	$	0.594	$	0.633	$	0.590	$	0.628	$	0.621

*Note: All volume, transaction fee data, and rate per contract information exclude CME Auction Markets products and Swapstream products.

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