Amended and Restated Summary of Retention and Benefit Agreements between the Board of Directors and Compensation Committee of CME Group Inc. (the "Company") and Terrence A. Duffy

Exhibit 10.19

Amended and Restated Summary of Retention and Benefit Agreements between the Board of Directors and

Compensation Committee of CME Group Inc. (the “Company”) and Terrence A. Duffy

On October 16, 2006, the Board of Directors of the Company appointed Terrence A. Duffy, the Company’s Chairman at the time, to serve as the Executive Chairman. On November 1, 2006, the Compensation Committee approved and the Board of Directors ratified Mr. Duffy’s compensation for his service as the Executive Chairman. The Compensation Committee also approved and the Board of the Directors ratified Mr. Duffy’s retention payment that was previously approved by the Board of Directors on January 31, 2005, with the clarification that the payment amount would be based upon Mr. Duffy’s annual base salary (currently $950,000) in lieu of the annual cash stipend he formally received for serving as a non-executive chairman. As a result, Mr. Duffy will be entitled to a payment equal to his annual base salary (“Retention Payment”) if at the end of his term as Executive Chairman he is willi