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 [phone]
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
[phone] 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.

   ISE Background

   The International Securities Exchange, the world's largest equity
options exchange, was founded on the principle that technology fosters
and infuses new efficiencies and operational innovations into
securities trading. After developing an innovative market structure
that integrated auction market principles into an advanced
screen-based trading system, ISE launched the first fully electronic
US options exchange in May 2000. ISE continually enhances its trading
systems to provide investors with the best marketplace to execute
their options orders.

   For more information about ISE, its products and its technology,
visit www.iseoptions.com.