NSX Releases May ETF/ETN Data Report

National Stock Exchange^SM(NSX^®) today announced that U.S. listed Exchange-Traded Fund (ETF) and Exchange-Traded Note (ETN) assets reached $623.6 billion at the end of May 2008, an increase of 25 percent over $498.6 billion at May 2007 month-end.

ETF net cash inflow for the month of May 2008 totaled $3.2 billion and notional trading volume during May 2008 totaled $1.4 trillion. The current number of U.S. listed ETFs has increased 44 percent to 767 compared to May 2007 when 532 ETFs were trading.

This data is included in NSX's May 2008 Month-End ETF/ETN Data Report released today. NSX began publishing Data Reports with the release of the June 2007 Report. These Data Reports are published following the end of each calendar month.

The NSX monthly statistics include shares of open-end exchange-traded products, encompassing listed shares of investment companies, grantor trusts, ETNs and commodity pools.

NSX's full report provides ETF data on Assets Under Management (AUM), Net Cash Flow and Notional Volume, broken out by Issuer, by Category, and the Top 10 ETFs by Size. To view this report go to: http://www.nsx.com/marketdata_monthly_etf.html.

In addition, NSX publishes a product-by-product breakdown of the 703 ETFs on which the data is based. The complete list can be accessed at: http://www.nsx.com/marketdata_monthly_etf2.html.

NSX is the cost-effective provider of exchange services, committed to aligning its interests with those of its customers. Founded in 1885, NSX has been a driving force for change in the world of securities exchanges and continues to lead the way in exchange innovation. For more information on NSX, visit www.nsx.com.