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Program Trading Averaged 24.2 Percent of NYSE Volume during May 12-16

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NEW YORK, May 22, 2008 -- The New York Stock Exchange today released its weekly program-trading data submitted by its member firms.  The report includes trading in all markets as reported to the NYSE for May 12-16.

The data indicated that during May 12-16, program trading amounted to 24.2 percent of NYSE average daily volume of 3,516.8 million shares1, or 852.5 million program shares traded per day.  This included program trading associated with the May 16 monthly expiration of stock-index options and futures.

Program trading encompasses a wide range of portfolio-trading strategies involving the purchase or sale of a basket of at least 15 stocks with a total value of $1 million or more.

In all markets, program trading by member firms averaged 2,347.1 million shares a day during May 12-16.  About 36.3 percent of program trading took place on the NYSE, 1.2 percent in non-U.S. markets and 62.4 percent in other domestic markets, including Nasdaq, the American Stock Exchange and regional markets.




1 The NYSE calculates program trading as the sum of shares bought, sold and sold short in program trades.  The total of these shares is divided by the sum of shares bought, sold and sold short on the NYSE including its crossing sessions.

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