NYSE Euronext to Launch Prime Source, an Independent Comprehensive Valuation Service

NEW YORK, NY--NYSE Euronext (NYX) today announced the launch of Prime Source, a new independent comprehensive valuation service. This innovative solution is designed to meet professional buy-side market participants’ needs for valuation of large, global portfolios of complex structured products and illiquid securities. Customers' valuation needs will be facilitated by efficient and sophisticated processes supported by Prime Source's unique, web-based technical infrastructure.

Prime Source allows users to access prices and valuation from different sources, including markets, dealer contributions, and valuation models. Offering both automated and tailor-made valuation services, Prime Source assists users in answering on a daily basis valuation issues in compliance with relevant regulations and accounting standards.

Prime Source’s valuation service works with the EuronextValue platform, which provides buy-side participants with bond and debt instrument market information and allows for the computation of asset valuations in compliance with applicable regulatory requirements. Prime Source also integrates the robust technology and processes developed by IVRS Ltd. that allow for the automated daily valuation of products in fixed income, credit and equity.

“The Prime Source valuation hub will offer a unique combination of valuation services that gives users the possibility to find in one independent, neutral place all the information they need to facilitate their valuation process,” said Roland Bellegarde, NYSE Euronext Head of European Cash Markets.

“Prime Source will be a key component of our offer in the securities value chain,” added Marie-Hélène Crétu, Director of Fixed Income of NYSE Euronext and CEO of IVRS Ltd. “The acquisition of IVRS Ltd and the addition of Prime Source to our product line constitutes a major step forward in a business we intend to develop even further, capitalizing on our existing solutions.”

For further information: www.euronext.com

About NYSE Euronext
NYSE Euronext (NYX) operates the world’s leading and most liquid exchange group, and seeks to provide the highest levels of quality, customer choice and innovation. Its family of exchanges, located in six countries, include the New York Stock Exchange, the world's largest cash equities market; Euronext, the Eurozone's largest cash equities market; Liffe, Europe's leading derivatives exchange by value of trading; and NYSE Arca Options, one of the fastest growing U.S. options trading platforms. NYSE Euronext offers a diverse array of financial products and services for issuers, investors and financial institutions in cash equities, options and derivatives, ETFs, bonds, market data, and commercial technology solutions. NYSE Euronext's nearly 4,000 listed companies represent a combined $30.5 trillion/€20.9 trillion in total global market capitalization (as of Dec. 31, 2007), more than four times that of any other exchange group. NYSE Euronext's equity exchanges transact an average daily trading value of approximately $141 billion/€103 billion (as of Dec. 31, 2007), which represents more than one-third of the world's cash equities trading. NYSE Euronext is part of the S&P 500 index and the only exchange operator in the S&P 100 index. For more information about NYSE Euronext, please visit www.nyx.com.

Cautionary Note Regarding Forward-Looking Statements
This press release may contain forward-looking statements, including forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include, but are not limited to, statements concerning NYSE Euronext's plans, objectives, expectations and intentions and other statements that are not historical or current facts. Forward-looking statements are based on NYSE Euronext's current expectations and involve risks and uncertainties that could cause actual results to differ materially from those expressed or implied in such forward-looking statements. Factors that could cause NYSE Euronext's results to differ materially from current expectations include, but are not limited to: NYSE Euronext's ability to implement its strategic initiatives, economic, political and market conditions and fluctuations, government and industry regulation, interest rate risk and U.S. and global competition, and other factors detailed in NYSE Euronext’s reference document for 2006 ("document de référence") filed with the French Autorité des Marchés Financiers (Registered on June 6, 2007 under No. R.07-0089), 2006 Annual Report on Form 10-K, as amended, and other periodic reports filed with the U.S. Securities and Exchange Commission or the French Autorité des Marchés Financiers. In addition, these statements are based on a number of assumptions that are subject to change. Accordingly, actual results may be materially higher or lower than those projected. The inclusion of such projections herein should not be regarded as a representation by NYSE Euronext that the projections will prove to be correct. This press release speaks only as of this date. NYSE Euronext disclaims any duty to update the information herein.