ISEE Select(TM) Enhancements Improve Functionality.

Customized sentiment data tool now available through expanded marketing alliance

NEW YORK -- The International Securities Exchange (NYSE: ISE) today announced the launch of an enhanced version of ISEE Select[TM], its customized sentiment data offering. New features include the ability to chart intraday and historical sentiment values as well as the capability to download the historical values for further analysis. These modifications respond to the most popular requests for additional functionality from current ISEE Select subscribers.

ISE also announced that it has expanded the ISEE Select marketing alliance to reach a broader audience of investors. Alliance partners now include brokerage firms as well as providers of investment research and tools. New members of the ISEE Select marketing alliance are OptionsDevil, Schaeffer's Investment Research, SentimenTrader, and Terra Nova Financial, LLC. Existing alliance partners include Interactive Brokers LLC, optionsXpress, Inc., and CyberTrader Inc., the direct access subsidiary of The Charles Schwab Corp. Alliance partners will provide a special promotional code to their clients so they will receive a discounted subscription fee when signing up for ISEE Select. Subscriptions are also available through the ISE website.

Introduced in October 2006, ISEE Select is an intuitive web-based tool that calculates sentiment values for individual securities and industry sectors based on proprietary ISE trade data. Unlike the traditional put/call ratio, the ISEE Select sentiment calculation includes only opening long ISE customer transactions. The result is that ISEE Select's sentiment index calculation may provide a more accurate reflection of true investor sentiment since trading activity by market makers and proprietary desks can often skew a sentiment value.

ISEE Select offers both a scanning tool and a query tool. Additional discounts are now available to subscribers that sign up for both tools and for annual subscriptions. To sign-up for a free trial of ISEE Select, or for more information on the marketing alliance, please visit www.iseoptions.com/isee.

ISE Background

International Securities Exchange Holdings, Inc. (NYSE: ISE), through its subsidiaries, operates a family of innovative securities markets. ISE is founded on the principle that technology and competition create better, more efficient markets for investors and consists of an options exchange, a stock exchange and an alternative markets platform. ISE continually enhances its trading systems and develops new products to provide investors with the best marketplace and investment tools to trade smarter.

ISE developed a unique market structure for advanced screen-based trading systems and in May 2000 launched the first fully-electronic US options exchange. Currently, ISE operates the largest U.S. equity options exchange and is among the leading options exchanges in the world. ISE offers index options, including a portfolio of proprietary index products, and enhanced market data products for sophisticated investors. ISE FX Options[TM] are slated to launch in 2007.

ISE Stock Exchange, launched in September 2006 with strategic partners, includes an innovative MidPoint Match[TM] platform which offers investors continuous price improvement. MidPoint Match was integrated with a fully-displayed Best Bid Offer market in the fourth quarter of 2006.

ISE's alternative markets business currently consists of an events market trading platform known as Longitude. Longitude's patented and proprietary technology provides a unique parimutuel structure for derivatives auctions which results in greater trading and pricing flexibility for market participants.

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.