ISE Statement On Patent Infringement Case

In the case of International Securities Exchange, LLC (ISE) v. Chicago Board Options Exchange, Inc. (CBOE), case no. 07C623, presiding Judge Joan H. Lefkow has issued a series of pre-trial rulings in CBOE's favor, thus forcing ISE to cease pursuit of the case in the United State District Court, Northern District of Illinois, at the present time.

ISE strongly believes in the merits of its case that CBOE copied and continues to infringe ISE's patented trading technology, and ISE plans to immediately file an appeal to the Federal Circuit to reverse these rulings. ISE will have no further comment at this time.