Welcome to the CME Globex Notices summary for the week of September 25, 2006.

• CME Electronic Trading Customer Forums

• October
  • Reminder: CME E-mini Eurodollars and Eurodollar 5-Year E-mini Bundles
  • Reminder: New Maximum Order Size Limit for CME Eurodollar Futures
  • Reminder: CME Equity Options Spreads Change
  • Reminder: Instrument Creation (MO) Market Data Message Schedule Change
  • CME Market Data Platform Enhancements

If you have any questions or concerns, please contact your CME Globex Account Manager at 312.634.8700; or at +44.207.623.2550 in Europe.

CME Electronic Trading Customer Forums 
CME is proud to host the CME Electronic Trading Customer Forums.

The CME Electronic Trading Customer Forums are a communication vehicle to update customers and solicit feedback on topics related to CME's electronic trading strategy over the next 6 - 12 months, including new policies, enhancements, and products. Representatives from FCMs, IBs, proprietary trading groups, ISVs and market data distributors are encouraged to attend.

These meetings will be followed by receptions. The Customer Forum in Singapore will be followed by a joint CME-NYMEX reception.

To attend a CME Electronic Trading Customer Forum, please register online.

The agenda includes:

• CME Product Update
• Electronic Options Update
• CME Globex Trader and CME EOS Trader Update
• User-Defined Spreads (UDS) Phase 2
• NYMEX Products on the CME Globex Platform
• CME Market Data Format
• New Offering: CME LNet
• New CME Certification Environments

These events are free and attendance is limited to CME customers.

Reminder: CME E-mini Eurodollars and Eurodollar 5-Year E-mini Bundles 
Effective Sunday, October 8 (trade date Monday, October 9), CME is scheduled to launch CME E-mini Eurodollars and CME Eurodollar 5-Year E-mini Bundles - the economic equivalent of 20 quarterly CME Eurodollar expirations in a single contract.

Eurodollars are U.S. dollars on deposit in commercial banks located outside of the United States; the standard contract has a principal value of $1,000,000 with a three-month maturity. CME E-mini Eurodollars are 1/10th the size of the large contract, with a principal value of $100,000, and are fully fungible with the full-sized CME Eurodollar futures contracts on a 10:1 basis.

CME Eurodollar 5-Year E-mini Bundles are traded as a free-standing instrument with a Notional Value per leg of $100,000 and a contract value factor of $5,000. CME Eurodollar 5-Year E-mini Bundle futures are 1/10th the size of conventional 5-year bundles, and are fully fungible with CME Eurodollar Bundles - ten E-mini Bundles equal one conventional CME Eurodollar 5-Year Bundle. CME Eurodollar 5-Year E-mini Bundle futures will be quoted in terms of price, not net change from the previous day's settlement, in contrast to traditional CME Eurodollar Bundles.

The CME E-mini Eurodollars and CME Eurodollar 5-Year E-mini Bundles are currently available for customer testing in the CME certification environment.

Reminder: New Maximum Order Size Limit for CME Eurodollar Futures 
Effective Sunday, October 8 (for trade date Monday, October 9), CME is increasing the maximum order size to 20,000 contracts for the serial and first eight quarterly CME Eurodollar futures and futures spreads. Previously, the maximum order size for these products was 10,000 contracts. The last 32 contracts remain at a 5,000 maximum.

Reminder: CME Equity Options Spreads Change 
Effective Sunday, October 15, 2006, to simplify listing groups in the CME Equity product complex, the Instrument Group Codes for CME Equity options spreads will be consolidated. Unique Instrument Group Codes will be assigned, per product, for all exchange-defined CME Equity options spreads. The Instrument Group Code can be found at position 70-71 in the Instrument Creation (MO) market data messages.

To support this change, all resting GTC and GTD orders in CME Equity options markets will be eliminated at session close Friday, October 13.

• All exchange-listed CME E-mini S&P 500^® options spreads will have the Instrument Group Code 1V.
• All exchange-listed CME E-mini NASDAQ-100^® options spreads will have the Instrument Group Code 2V.
• All exchange-listed CME E-mini Russell 2000^® options spreads will have the Instrument Group Code 3V.

These CME Equity options spreads will be available in the CME certification environment with the new Instrument Group Codes on Sunday, October 8, for customer testing.

Reminder: Instrument Creation (MO) Market Data Message Schedule Change 
Effective Sunday, October 15, in the CME production environment, CME is changing the schedule for the Sunday referential broadcast of the Instrument Creation (MO) market data messages. MO messages will be disseminated around 12:00 p.m. Central time (CT), about two hours earlier than the present schedule.

The referential broadcast for the CME certification environment is currently scheduled at 12:00 p.m. CT.

CME Market Data Platform Enhancements 
Administrative Message Routing
To streamline market data processing, effective Sunday, October 22, 2006, in the CME production environment, the following market data messages, currently disseminated via the administration channel, will be disseminated via the relevant CME Market Data Platform product channels:

• Instrument Creation (MO) messages
• Trading Day Timetables (MH) messages
• Group State Change Marker (MJ) messages
• Start of CME Globex Platform (MK) messages
• Start of Instrument Referential Broadcasting (ML) messages
• End of Instrument Referential Broadcasting (MM) messages

These administrative messages will be broadcast via both the relevant product channels and the administration channel for two months to ensure adequate customer testing time. These messages will then only be disseminated via the relevant product channel. The SPI mail messages will be the only market data messages broadcast on the administration channel.

These changes, with these messages broadcast on both the administration and product channels, are currently available in the CME certification environment.

More information on the CME Market Data Platform is available in the CME Market Data Platform Developer's Guide. Details on the CME market data messages can be found in the CME Market Data Platform RLC Message Specifications.

Market Data Message Batching
Also effective Sunday, October 22, to improve the efficiency of market data dissemination, the CME Market Data Platform is enabling the market data message batching functionality. Multiple market data messages will be batched into a single network frame. Although this functionality has been available since the launch of the CME Market Data Platform, as outlined in the CME Market Data Platform Developer's Guide, Section 3.1.2 Message Batching, CME is leveraging it now in response to the market data messaging increases.

To facilitate customer testing, the batching functionality is currently enabled for all channels in the CME certification environment and on the CME Globex Equity Options channel (8) only in the CME production environment. Continuous batching of simulated market data messages for CME Class III Milk futures (product code = DC) on the CME Globex Commodities, Industrial Commodities and TRAKRS^SM Options channel (14) is now available in the CME certification environment.

Please contact your CME Globex Account Manager with any questions or concerns.