International Securities Exchange Announces Date Of Third Quarter 2005 Earnings Release And Conference Call

The International Securities Exchange (NYSE:ISE) announced today that it will issue its earnings release for the third quarter 2005 on Thursday, October 27, 2005 before the financial markets open. The Company will host a conference call at 10:00 a.m. (Eastern Daylight Time) to discuss the results with the investment community. All interested parties can listen to a live audio webcast that will be hosted on the Investor Relations section of the Company's web site at www.iseoptions.com. An investor presentation that will be referenced during the call will also be posted to the web site.

The conference call can also be accessed by calling (866) 700-7101 and dialing the participant passcode 13946096. Please reserve a line 15 minutes prior to the start of the conference call. The conference call replay will be available from 12:00 p.m. on October 27, 2005 until midnight on October 28, 2005 and can be accessed by calling (888) 286-8010 and dialing the participant passcode 26473012. An archived replay of the call will be available on the Investor Relations section of the Company's web site at www.iseoptions.com.