ISE Intl Secs Exchange Hldgs

The International Securities Exchange (NYSE:ISE) announced today that it will host a conference call tomorrow, Wednesday, April 19, 2006, at 8:30 a.m. Eastern Time. ISE Management will discuss in more detail a press release to be distributed prior to the call concerning a new product line introduction. 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. Other details related to the conference call will be contained in the press release. 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. Forward Looking Statements Certain matters discussed in this press release are "forward looking statements" intended to qualify for the safe harbor from liability established by the Private Securities Litigation Reform Act of 1995. These statements relate to future events or our future financial performance, and involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements, to be materially different from those contemplated by the forward looking statements. We undertake no ongoing obligation, other than that imposed by law, to update these statements. Factors that could affect our results, levels of activity, performance or achievements and cause them to materially differ from those contained in the forward looking statements can be found in our filings with the Securities and Exchange Commission, including our annual report on Form 10-K, current reports on Form 8-K and quarterly reports on Form 10-Q, as amended.