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Citadel Derivatives Group, L.L.C. Becomes Equity Investor In Boston Options Exchange Group LLC

Date 12/01/2005

Citadel Derivatives Group, L.L.C., an affiliate of Citadel Investment Group, L.L.C., has signed an agreement to join the Boston Options Exchange Group LLC (BOX) as an equity partner, making it the seventh broker dealer to invest in BOX. Citadel will join, Citigroup, Credit Suisse First Boston, Interactive Brokers, JPMorgan, Morgan Stanley and UBS as a BOX shareholder. The remaining capital is held by two of the founding partners, the Boston Stock Exchange and the Montreal Exchange.

“We are obviously thrilled to have a firm like Citadel invest in BOX. They are recognized as a leader in the equity options markets and have been actively trading on BOX since our launch in February 2004,” said Kenneth Leibler, Chairman of BOX. “This confirms the momentum BOX established during its first year of operations and is a big vote of confidence in BOX’s future.”

“We are excited to become an equity partner in BOX,” said Matt Andresen, Co-Head of Citadel Derivatives Group. “At Citadel, we have a deep and long-standing commitment to electronic markets. Our investment in BOX is a demonstration of our confidence in the efficiency of electronic options trading in general, and the BOX’s technology and model in particular.”

“Citadel is a very important part of the US options business and we are very happy to see them cement our present business relationship with a deeper commitment,” said Will Easley, Managing Director of BOX. “In our first year we have met virtually all of our target milestones: listing 350 classes, having over 70 Participant firms connected, and averaging almost 5% market share over the last quarter of 2004.”