CME Group will implement the following Equity Index product changes on Sunday, August 19, 2007:

• Expand listed option contracts to include four (4) quarterly months on:
     o E-mini S&P 500 Options (ES)
     o E-mini NASDAQ-100 Options (NQ)
     o NASDAQ-100 Options (ND)
     o E-mini Russell 2000 Options (ER)

• Expand End-Of-Month options to include six (6) consecutive month options listings, from the current listing of 2 serial months for:
     o S&P 500 EOM Options (EV)
     o E-mini S&P 500 EOM Options (EW)

• Add S&P Mid-Cap 400 Options on CME Globex®.  See Exhibit 1 (attached) for full contract specifications.

• Change the existing S&P 600 SmallCap Futures contract from a full-size contract to an E-mini contract
     o Minimum tick value changes from $20 to $10
     o Multiplier is halved from 200 to 100
     o E-mini S&P 600 SmallCap futures will be fully fungible with the new “full-size” S&P 600 SmallCap futures contract (defined below) on a 5:1 basis
     o Clearing Product Code changes from EP to SMC.
     o All other specifications remain as originally detailed.  Click here to see existing product specifications.

• Add a new “full-size” SmallCap S&P 600 Futures Contract (Open Outcry only) -- please refer to Exhibit 2 (attached) for detailed product specifications.  Highlights of the new contract are:
     o Multiplier is $500
     o Minimum tick value is $.05 Index Points ($25 per contract)
     o “Full-size” CME Small Cap S&P 600 Futures contract is fully fungible with the new E-mini S&P 600 Small Cap Futures contract (immediately above)  on a 1:5 basis

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