Euronext N.V.

Regulatory Filings • Nov 7, 2008

CONTACT | Media: +31.20.550.4488 (Amsterdam), +32.2.509.1392 (Brussels) +351.217.900.029 (Lisbon), +44.20.7379.2789 (London) +1.212.656.2411 (New York), +33.1.49.27.11.33 (Paris)

CONTACT | Investor Relations: +1.212.656.5700 (New York) +33.1.49.27.58.60 (Paris)

NYSE Euronext Business Summary for October 2008

Nov. 7, 2008 – NYSE Euronext (NYX) experienced record trading activity on its U.S. and European cash equities exchanges and strong volumes on its European derivatives unit, Liffe, during the month of October 2008. Volumes for October 2008 include trading activity from the equity and options markets of NYSE Alternext US (formerly the American Stock Exchange).

NYSE Euronext's European cash markets executed record average daily volume of 2.1 million transactions1 , an increase of 61.8% compared to the same period last year. European cash trading activity qualifying for Pack Epsilon pricing represented over 35% of total transactions executed in October 2008. During the month, the company's U.S. cash markets executed record average daily volume of 4.8 billion shares traded, an increase of 78.5% versus October 2007. Tape A market share was 42.8% for October 2008, an increase from September 2008 levels. This represents the second consecutive monthly increase in market share.

NYSE Euronext's European derivatives unit, Liffe, traded an average of 4.4 million futures and options contracts in October 2008, a 37.1% increase from the previous year. Bclear, Liffe's trade administration and clearing service, processed 664,000 contracts per day in October, a 115.9% increase from the previous year. NYSE Euronext's U.S. options exchanges executed a combined average daily volume of 2.6 million contracts in October 2008.

Please click here for the Monthly Transaction Activity Data Table.

About NYSE Euronext

NYSE Euronext (NYX) is the world's leading, most liquid and diverse exchange group. It offers a broad and growing array of financial products and services in cash equities, futures, options, exchange-traded products, bonds, market data, and commercial technology solutions, all designed to meet the evolving needs of issuers, investors and financial institutions. Spanning multiple asset classes and six countries, NYSE Euronext's exchanges include the New York Stock Exchange, Liffe, Euronext and NYSE Arca. With more than 6,500 listed issues, more than any other exchange group, trading on NYSE Euronext's equity markets represents more than one-third of the world's cash equities volume. NYSE Euronext also manages the leading

¹ Euronext equities transactions count each buy and sell order as separate transactions, NYSE Group equities transactions count buy and sell orders together as a single transaction. All NYSE Euronext derivatives transactions count buy and sell orders together as a single transaction.

European derivatives exchange by value of 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, 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 2007 ("document de référence") filed with the French Autorité des Marchés Financiers (Registered on May 15, 2008 under No. R. 08-054), 2007 Annual Report on Form 10-K 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.