ISE Intl Secs Exchange Hldgs

The International Securities Exchange (NYSE: ISE) today announced that the ISE Stock Exchange reached a new volume record on Thursday, August 9, 2007 when 53,233,000 shares traded on its equities platform. Andrew Brenner, head of ISE Stock Exchange, said, �Reaching the fifty million share mark in daily volume is an important milestone as the ISE Stock Exchange continues to build momentum and add liquidity to our platform. Although we are in the early stages of growth, we will maintain our progress by providing our members with a fast and flexible platform that maximizes trading functionality and offers the opportunity for price improvement. We are confident that we will be able to continue to grow rapidly and encourage all potential members to join us in this exciting phase.� The ISE Stock Exchange launched in September 2006 and has consistently increased trading volume since inception. Over 1 billion shares have exchanged hands on the platform since its launch. The ISE Stock Exchange integrates a fully displayed stock market with MidPoint MatchSM, a continuous, anonymous platform for trading equities at the midpoint of the National Best Bid and Offer (NBBO). The ISE Stock Exchange is a completely automated and Reg NMS compliant market place that offers high-speed order execution capabilities, a competitive pricing structure and neutral access rules. 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 world�s largest equity options exchange. ISE offers index options, including a portfolio of proprietary index products, and enhanced market data products for sophisticated investors. ISE FX OptionsSM launched in the second quarter of 2007. ISE Stock Exchange, launched in September 2006, is a completely electronic marketplace and the only dual structure platform that integrates a dark pool, MidPoint MatchSM, with a fully displayed stock market. Midpoint Match is a proprietary, non-displayed market that trades equity securities at the midpoint between the National Best Bid and Offer (NBBO). 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. For more information about ISE, visit www.ise.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.