- Index Services to Serve as a Launch Pad for ETFs; Newbridge Nanotechnology Index is First Index to List on ArcaEx -

CHICAGO, June 7 /PRNewswire/ -- The Archipelago Exchange (ArcaEx), the nation's first totally open, all-electronic stock exchange, today announced a new service dedicated to indexes. As part of the new service, ArcaEx will serve as the calculation agent for newly created third party indexes and disseminate the index values to the consolidated tape association for investors and data vendors to access. The service also provides a listings' venue for those indexes and ETF's that choose to list on ArcaEx, a facility of the Pacific Exchange.

ArcaEx Index Services includes index ticker symbol creation, real time calculation of third party indices, and a real-time data feed. Listed indexes will also have dedicated space on the ArcaEx website offering a description of the index calculation methodology, charts, downloadable data tools and other features for real time and historical values. Archipelago plans to launch the service in the third quarter of 2005 and has already received strong client interest.

"The number of indices in the U.S. is growing rapidly as more creative investors continue to seek benchmarks for their unique investing styles, which is leading to increased demand for listings services at the exchanges," said Lisa Dallmer, Director of ETF Listings Services at the Archipelago Exchange. "ArcaEx has a unique position as an electronic exchange to facilitate these index listings through our ability to better handle real-time information and calculations."

Dallmer continued, "The real upside for ArcaEx is the opportunity to be well-positioned to list indexes that attract the interest of a sponsor and ultimately become exchange-traded funds (ETFs). The ETF market is poised for growth, and electronic exchanges are an ideal listing venue for these incredibly liquid investment tools."

"Electronic exchanges like ArcaEx are a great place for the listing of an index," said Guy Amico, president of Newbridge Securities Corporation. "We are thrilled to be the first client and believe ArcaEx's technology platform provides just the traction needed to increase the use of our Nanotechnology index."

The Newbridge Nanotechnology Index has been constructed to track the stock market performance of companies that are currently active in nanotechnology, which involves the precise assembly and manipulation of matter at the atomic or molecular level.

About ArcaEx

Archipelago Holdings Inc. (PCX: AX) operates the Archipelago Exchange (ArcaEx(R)), the first totally open all-electronic stock exchange in the United States to trade Nasdaq-listed equity securities and exchange listed equity securities, including those traded on the New York Stock Exchange(R), American Stock Exchange(R) and Pacific Exchange(R). ArcaEx offers corporate issuers and investors the advantages of meeting directly, without intermediaries within a fully electronic and totally transparent environment. ArcaEx is a facility of and regulated by the Pacific Exchange, a registered exchange. ArcaEx was approved by the Securities and Exchange Commission in October 2001 and ArcaEx began trading operations in March 2002. The Archipelago ECN, a precursor to ArcaEx, was one of the four original ECNs, formed in December 1996 with Townsend Analytics. For more information please visit http://www.arcaex.com.

Certain statements in this press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on Archipelago's current expectations and involve risks and uncertainties that could cause Archipelago's actual results to differ materially from those set forth in the statements. There can be no assurance that such expectations will prove to be correct. Factors that could cause Archipelago's results to differ materially from current expectations include: general economic and business conditions, industry trends, competitive conditions, regulatory developments as well as other risks or factors identified in the Company's filings with the Securities Exchange Commission, including its Report on Form 10-K for the fiscal year ending December 31, 2004 which is available on the Company's website at http://www.archipelago.com. You should not place undue reliance on forward-looking statements, which speak only as of the date of this press release. Except for any obligation to disclose material information under the Federal securities laws, Archipelago undertakes no obligation to release publicly any revisions to any forward-looking statements to reflect events or circumstances after the date of this press release.

Archipelago Contacts:
Margaret Nagle
312-442-7083
SOURCE ArcaEx
06/07/2005
CONTACT: Margaret Nagle of Archipelago, +1-312-442-7083
/Web site: http://www.arcaex.com
http://www.archipelago.com/
(AX)
CO: ArcaEx; Archipelago Holdings Inc.