ISE Intl Secs Exchange Hldgs

The International Securities Exchange (NYSE:ISE) announced that it set a new record daily trading volume of 5,531,875 equity and index options contracts on Tuesday, February 27, 2007. ISE is pleased to report that its highly reliable and scalable trading platform effectively handled almost one million more contracts than the previous record of 4,580,678 contracts, set on January 20, 2006. Trading volume in the Nasdaq-100 Index Tracking Stock (QQQQ) also reached a new high yesterday. 1,032,296 contracts traded on ISE, exceeding ISE�s previous record of 515,926 contracts set on January 20, 2006. The Nasdaq-100 Index Tracking Stock is one of the thirteen options classes that are part of an industry-wide pilot to quote and trade in penny increments and currently trades in one-cent increments at all prices. 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� are slated to launch in 2007. ISE Stock Exchange, launched in September 2006 with strategic partners, includes an innovative MidPoint Match� platform which offers investors continuous price improvement. MidPoint Match was integrated with a fully-displayed Best Bid Offer market in December 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. For more information about ISE and its options exchange, visit www.iseoptions.com and for more information about ISE Stock Exchange, visit www.isestock.com. Additionally, to learn more about ISE alternative markets technology, visit www.longitude.com. 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.