triple witching hour
noun
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.
Origin of triple witching hour
First recorded in 1985–90
Words nearby triple witching hour
triple superphosphate,
triple threat,
triple time,
triple vision,
triple voile,
triple witching hour,
triple-decker,
triple-digit,
triple-double,
triple-expansion,
triple-header