The CME Group will launch Synthetic OTC Ethanol Futures on October 15, 2007 (Modified). The Synthetic OTC Ethanol Futures will be created only for the purposes of daily and final settlement prices. The Synthetic OTC Ethanol Futures are not tradable and are only used for a theoretical index to price OTC Cash Settled Ethanol Options.

Please view the following specifications for Synthetic OTC Ethanol Futures:

Ticker Symbol:

OTC: ACX

QVS Product Grouping:

Promotional

Trading Unit:

29,000 gallons

Trading Hours:

Electronic: 6:36 p.m. to 6:00 a.m. and 9:30 a.m. to 1:15 p.m. Chicago Time, Sunday through Friday.

Contract Month Cycle:

24 consecutive calendar months

Min. Price Fluctuation:

$.001/gal = $29.00 per contract

Max. Price Fluctuation:

None

Daily Price Limits and Dynamic Price Limit Ranges:

15 cents/gal daily price limits; dynamic price limits to match 1 contract

Position Limits:

200 contracts in the spot month, 1,000 contracts in a single month, and 1,000 contracts in all months combined.

Last Trading Day:

The third business day of the delivery month.

Expiration:

12:00 p.m. Chicago Time

Delivery Standards/Exercise Procedures:

Physical delivery by tank car, on track, at shipping origin with seller responsible for transporting product to buyer's destination. Freight charges are privately negotiated between buyer and seller. Should private negotiations fail, the seller shall deliver in-tank at the buyer's Chicago, IL Terminal.

ITC Fractional Indicator:

3

ITC Price Formats:

0001620

0001621

0001622

0001623

Please contact the Market Data Vendor Help Desk at (312) 341-3163 or cbotvendorsupport@cmegroup.com, if you have any questions.