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CHICAGO BD. v. INTERNATIONAL SECURITIES

Nos. 1-10-2228, 1-10-2252.

973 N.E.2d 390 (2012)

362 Ill. Dec. 290

CHICAGO BOARD OPTIONS EXCHANGE, INCORPORATED, CME Group Index Services, L.L.C., and The McGraw-Hill Companies, Inc., Plaintiffs-Appellees, v. INTERNATIONAL SECURITIES EXCHANGE, L.L.C., and The Options Clearing Corporation, Defendants-Appellants.

Appellate Court of Illinois, First District, Sixth Division.

May 25, 2012.

Attorney(s) appearing for the Case

William J. Nissen and Jamie E. Haney , both of Sidley Austin LLP, and Andrew L. Deutsch , Kenneth L. Schmetterer , and Steven L. Reynolds , all of DLA Piper LLP (US), both of Chicago, for appellants.

Paul E. Dengel , Stacie R. Hartman , and Ayad P. Jacob , all of Schiff Hardin LLP, and Robert P. LoBue , Adeel A. Mangi , and Elizabeth Shofner , all of Patterson Belknap Webb & Tyler LLP, both of Chicago, and R. Bruce Rich , Benjamin E. Marks , and Mark J. Fiore , all of Weil, Gotshal & Manges LLP, and Alan L. Unikel and Justin K. Beyer , both of Seyfarth Shaw LLP, both of New York, New York, for appellees.

OPINION

Justice GARCIA delivered the judgment of the court, with opinion.

¶ 1 Defendants International Securities Exchange (ISE) and The Options Clearing Corporation (OCC) appeal the circuit court's order enjoining them from providing an exchange market for the trading of index options tethered to the Dow Jones Industrial Average (DJIA) and the S & P 500 Composite Stock Price Index (S & P 500...

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