The New York Stock Exchange 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 7-11.

The data indicated that during May 7-11, program trading amounted to 33.2 percent of NYSE average daily volume of 3,117.2 million shares¹, or 1,034.2 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 second 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 May 7-11, there were no such periods. 

In all markets, program trading by member firms averaged 2,150.5 million shares a day during May 7-11.  About 48.1 percent of program trading took place on the NYSE, 3.5 percent in non-U.S. markets and 48.4 percent in other domestic markets, including Nasdaq, the American Stock Exchange and regional markets.

The data indicated that during Apr. 30-May 4, program trading amounted to 34.3 percent of NYSE average daily volume of 3,483.6 million shares¹, or 1,195.6 million program shares traded per day.

The data indicated that during Apr. 23-27, program trading amounted to 32.0 percent of NYSE average daily volume of 3,350.1 million shares¹, or 1,070.4 million program shares traded per day.

The data indicated that during Apr. 16-20, program trading amounted to 34.5 percent of NYSE average daily volume of 3,491.6 million shares¹, or 1,206.0 million program shares traded per day. This included program trading associated with the April 20 monthly expiration of stock-index options and futures.

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.