A Flash Crash refers to a very sudden and severe drop in security prices, followed by a quick recovery. The term is most famously associated with the nearly 1,000-point drop in the Dow Jones Industrial Average (DJIA) on May 6, 2010.
Program trading refers to the institutional buying or selling of all stocks in a program or index on which options and/or futures are traded, often resulting in significant stock market fluctuations.
