One of the big themes so far this year has been the return of volatility to the stock market. After a very calm 2017, markets have gotten much more turbulent in 2018. One way to quantify this is to look at daily movements. In 2018 (through April 9), the S&P 500 had an intraday swing of 2 percent or more on 13 days. The day-to-day price movements, measured at the close, have been more than ±2 percent on eight days. Neither of those happened in 2017, at all. There clearly has been an increase in volatility, and in a big way.
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