December 9, 2010


To Our Valued Customers:

Today we are pleased to announce that CME Group has entered into an agreement to acquire Elysian Systems Ltd., an independent provider of electronic trading and market technology. We expect to close this acquisition later today.

By combining Elysian technology with CME ClearPort OTC clearing services in 2011, we will be one step closer to providing you with a true end-to-end solution for your energy business. This acquisition will benefit you by providing one interface for you to use to access multiple pools of liquidity. Our goal is to create more efficient market access and offer you straight-through-processing, all with the safety and security of CME Clearing.

We plan to combine Elysian with CME ClearPort in the coming months, and we will advise you of our progress along the way. We will be reaching out to you directly to seek your feedback through this transition. For more information, please be sure to visit www.cmegroup.com/elysian.

We value your business, and we look forward to providing you with the global energy benchmarks, deep liquidity, leading technology and outstanding customer service that you have come to expect from CME Group.


Sincerely,

Joe Raia
Managing Director, Energy & Metals Products
CME Group