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Wildest Day in 2 Months for S&P 500 as Stock Swings Echo October

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Investors were whipsawed by the biggest stock swings in two months as oil volatility dragged the Standard & Poor’s 500 Index further from the record it reached less than two weeks ago.

The S&P 500 rose 0.8 percent in the first 30 minutes of trading then sank 1 percent, tracing a 36-point arc that was the biggest for any day since mid-October, when the index was ending its worst retreat in 2014. Equities followed fluctuations in crude as West Texas Intermediate reversed an early rally and plummeted 3.1 percent.