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Traders said the convergence of four key expirations, known as quadruple witching, had added to volatility.
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It is also known as the quadruple witching hour when single stock futures are taken into account.
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A " quadruple witching" expiration of June stocks and index futures and options increased trading volatility.
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Traders said more volatility could be seen from the convergence of four key expirations, known as quadruple witching.
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However, a " quadruple witching" expiration of June stocks and index futures and options increased trading volatility.
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The run-up to the convergence of four key expirations, known as quadruple witching, is expected to spike volatility.
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Friday also marked the expiration of stock options, index options, index futures and single-stock futures, known as quadruple witching.
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However, a " quadruple witching" expiration of June stock, index futures and options boosted volatility for the index.
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Friday's volatility also stemmed from " quadruple witching", where investors unwound positions in futures and options contracts before they expired.
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Trading was expected to be volatile due to " quadruple witching," the expiry of index and individual stock futures and options.
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But Friday marked " quadruple witching," in which futures and options expiries occur, and that typically translates into elevated volume and liquidity.
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The quadruple witching period, as it's called, refers to the quarterly settlement and expiration of four different types of June equity futures and options contracts.
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Volatility may rise during Friday's session on account of " quadruple witching," as investors unwind interests in futures and options contracts prior to expiration.
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Volatility may rise during the session on account of " quadruple witching," as investors unwind interests in futures and options contracts prior to expiration.
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Volume was high, at more than 165 percent of the 90-day average for the index, boosted by " quadruple witching".
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Stocks trading volume was expected to be higher than normal on Friday due to " quadruple witching," the simultaneous expiration of U.S. options and futures contracts.
