the last hour of trading on the New York Stock Exchange on the four Fridays each year when stock options, stock index futures, and options on such futures simultaneously expire: regarded as a time of extreme volatility in trading
Word origin
[1985–90]
Examples of 'triple witching hour' in a sentence
triple witching hour
This event gave rise to the term 'triple witching hour', which has now become part of stock market lore.