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Triple witching hour

Definition: [crh] The four times a year that the S&P futures contract expires at the same time as the S&P 100 Definition: HREF="/?rd=index+option">index option contract and option contracts on individual stocks. It is the last trading hour on the thirdDefinition: Friday of March, June, September, and December, when stock options, futures on stock indexes, and optionsDefinition: on these futures expire concurrently. Massive trades in index futures, Definition: >options, and underlying stock by hedge strategists and arbitrageurs cause abnormalDefinition: activity (noise) and volatility.

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