New York, June 17, 2005 — The Nasdaq Stock Market, Inc. (NASDAQ: NDAQ) announced today that in connection with the Department of Justice's (DOJ) investigation under the Hart-Scott-Rodino Antitrust Improvements Act of its pending acquisition of Instinet Group Incorporated Inc. (“Instinet”), the DOJ has issued a Request for Additional Information and Documentary Materials (a “Second Request”) to NASDAQ.

The Second Request suspends the 30-day period in which the DOJ is required to conclude its investigation and make a determination on the NASDAQ acquisition of Instinet. A new 30-day period will commence once NASDAQ and Instinet substantially complete their replies to the Second Request. The parties expected to receive this Request, and continue to work with the Department of Justice. The parties intend to respond promptly to the Request and believe that it should not affect the anticipated timing of the merger closing.

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Cautionary Note Regarding Forward-Looking Statements
The matters described herein may contain forward-looking statements that are made pursuant to the Safe Harbor provisions of the Private Securities Litigation Reform Act of 1995. The NASDAQ Stock market, Inc. (“NASDAQ”) cautions that these statements are not guarantees of future performance. Actual results may differ materially from those expressed or implied in the forward-looking statements. Forward-looking statements involve a number of risks, uncertainties or other factors beyond NASDAQ’s control. These factors include, but are not limited to, NASDAQ’s ability to implement its strategic initiatives, economic, political and market conditions and fluctuations, government and industry regulation, interest rate risk, U.S. and global competition, and other factors detailed in NASDAQ’s annual report on Form 10-K, and periodic reports filed with the U.S. Securities and Exchange Commission. We undertake no obligation to release any revisions to any forward-looking statements

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