Exchange operator CME Group and Citadel Investment Group are hoping to change that.

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The firm suffered significant losses during the global economic recession that followed, starting with the costly divestiture deal with the Citadel Investment Group in late 2007 to offload its subprime portfolio.

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Also in late 2009, Chicago hedge fund giant Citadel Investment Group became embroiled in a legal battle with two former staffers who had started up their own high-frequency trading outfit, Teza Technologies.

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Chicago-based Citadel Investment Group backed CIG Re Ltd.

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In a meeting at the New York Fed Monday afternoon, 17 commercial and investment banks joined three fund managers (including the Chicago hedge fund Citadel Investment Group) and trade groups to talk about ways of providing better disclosure of the over-the-counter derivatives market, which is part of the so-called shadow banking system.

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Boldly moving out of its comfort zone, the 327-year-old exchange bought a controlling stake in the London-based Equiduct trading platform and entered a strategic relationship with the investment banks Citadel Securities and Knight Capital Group, to become a market to be reckoned with.

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He refused and then gave traders at SAC Capital, Citadel Asset Management, and mutual-fund firms Janus Capital Group, Wellington Management Co. and MFS Investment Management a heads up about the investigation.

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