Earnings Volatility Jumps in U.S. as Moves Biggest Since ’12

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Investors in U.S. stocks are rediscovering the power of earnings.

In the Nasdaq 100 Index, companies have swung up or down an average of more than 5 percent immediately after reporting results in the past three weeks, the highest since 2012, data compiled by Bloomberg show. Those that disappoint investors tumbled 4.8 percent while those pleasing them gained 5.3 percent.