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Related to Triple Witching: Quadruple Witching
The last hour of trade on an exchange on the third Friday of March, June, September, and December. It is the time of expiration for three types of standardized contracts: stock options, stock index options, and stock index futures. Investors often unwind their positions on these contracts during or immediately before triple witching hour, which leads to increased trading volume on those hours. See also: Quadruple witching day.
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