Stock Market Glossary letter P

Program Trading – Program Trading is a practice by which computer programs are used to automate the purchase or sale of large blocks of stock when certain pre-set price points are reached. Popularly used by large hedge funds and arbitrage specialists, program trading has been blamed for causing the 1987 โ€œBlack Mondayโ€ stock market crash in which American stock markets lost 22.68% of their value in a single dayโ€™s trading.

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