Program Trading Averaged 21.2 Percent of NYSE Volume during Aug. 18-22

NEW YORK, Aug. 28, 2008 -- The New York Stock Exchange, a subsidiary of NYSE Euronext (NYX), 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. 18-22.
The data indicated that during Aug. 18-22, program trading amounted to 21.2 percent of NYSE average daily volume of 3,363.6 million shares1, or 713.9 million program shares traded per day.

Program trading encompasses a wide range of portfolio-trading strategies involving the purchase or sale of a basket of at least 15 stocks.

In all markets, program trading by member firms averaged 2,289.6 million shares a day during Aug. 18-22. About 31.2 percent of program trading took place on the NYSE, 0.9 percent in non-U.S. markets and 67.9 percent in other domestic markets, including Nasdaq, the American Stock Exchange and regional markets.


Source: http://www.nyse.com/press/1219918586513.html