Program Trading Averaged 36.2 Percent of NYSE Volume during August 6-10

NEW YORK, Aug. 16, 2007 -- 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 Aug. 6-10.

The data indicated that during Aug. 6-10, program trading amounted to 36.2 percent of NYSE average daily volume of 5,188.2 million shares1, or 1,880.0 million program shares traded per day.

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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.

For the third quarter of 2007, the NYSE’s program-trading report includes profiles of program trading whenever the New York Stock Exchange Composite Index (NYA) moves 190 points or more in a single direction during any one-hour period. During Aug. 6-10, there were no such periods.

In all markets, program trading by member firms averaged 4,266.9 million shares a day during Aug. 6-10. About 44.1 percent of program trading took place on the NYSE, 0.7 percent in non-U.S. markets and 55.2 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.

Source: NYSE Euronext