Summary Box: Options exchange CBOE plans IPO
LONG WAIT: The settlement of a nearly two-year legal dispute over payment for ownership rights with with the CME Group Inc. in August 2008 cleared the way for the CBOE's IPO.
TAKEOVER TARGET?: Exchanges have been busy combining to cut costs. Acquisitions and mergers have quickly followed IPOs of other exchanges CBOE could be a takeover candidate after it completes its IPO.
REGULATORY RISK: Trading of derivatives has exploded over the past decade. Now regulators and politicians want to increase regulation and oversight of these financial instruments, which could hurt CBOE's revenue.

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