The data indicated that during Apr. 4-8, program trading amounted to 28.6 percent of NYSE average daily volume of 1,716.2 million shares1, or 491.6 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.
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.
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