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 Feb. 20-23.

The data indicated that during Feb. 20-23, program trading amounted to 29.7 percent of NYSE average daily volume of 2,969.0 million shares1, or 882.1 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 with a total value of $1 million or more.

For the first quarter of 2007, the NYSE’s program-trading report includes profiles of program trading whenever the New York Stock Exchange Composite Index (NYA) moves 180 points or more in a single direction during any one-hour period. During Feb. 20-23, there were no such periods.

In all markets, program trading by member firms averaged 1,874.3 million shares a day during Feb. 20-23. About 47.1 percent of program trading took place on the NYSE, 2.3 percent in non-U.S. markets and 50.7 percent in other domestic markets, including Nasdaq, the American Stock Exchange and regional markets.