The data indicated that during Aug. 12-Aug. 16, program trading amounted to 34.5 percent of NYSE average daily volume of 1,340.1 million shares, or 462.5 million shares a day. This included program trading associated with the Aug. 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. Program trading is calculated as the sum of the shares bought, sold and sold short in program trades. The total of these shares is divided by total reported volume.
This is not the only way to measure program trading. Three alternatives for Aug. 12-Aug. 16 would be to:
- examine buy programs as a percentage of total purchases (17.5 percent);
- examine sell programs as a percentage of total sales (17.0 percent);
- examine program purchases and sales as a percentage of total purchases and sales or twice total volume (17.3 percent);.
In all markets, program trading averaged 1005.6 million shares a day during Aug. 12-Aug. 16. About 46.0 percent of program trading took place on the NYSE, 31.8 percent in non-U.S. markets and 22.2 percent in other domestic markets, including Nasdaq, the American Stock Exchange and regional markets.
In aggregate, program volume executed on the NYSE by firms as agent, for non-member customers, amounted to 57.2 percent during Aug. 12-Aug. 16. Program volume executed as principal, for their own accounts, amounted to 39.7 percent of program volume.
Another 3.1 percent was designated as customer facilitation, in which a member firm established or liquidated a principal position to facilitate a program order initiated by a customer.
Of the five member firms reporting the most program trading activity on the NYSE, Morgan Stanley and UBS Warburg executed most of their program trading as principal, for their own accounts. Deutsche Banc Alex Brown, RBC Dominion and Bear Stearns executed most of their program trading activity for customers, as agent.
During Aug. 12-Aug. 16, 14.2 percent of program volume executed by NYSE member firms related to index arbitrage. Index arbitrage is defined as the purchase or sale of a basket of stocks in conjunction with the sale or purchase of a derivative product such as stock-index futures, to profit from the price difference between the basket and the derivative product.
Less than 0.5 percent involved derivative product-related strategies (besides index arbitrage) that are subject to Rule 80A. The rule provides that derivative-related program strategies be executed only in a stabilizing manner after the DJIA moves 180 points or more from the previous day's close.
In addition to index arbitrage, such strategies include customer facilitations, liquidation of facilitations, index substitutions, liquidation of error accounts, risk modifications, and liquidation of exchange-for-physicals stock positions.
All other types of portfolio-trading strategies combined accounted for 85.8 percent of member firms' program-trading volume during Aug. 12-Aug. 16.
