Watch volatility spike, and then watch investors scatter for safety. Only this time, they don’t seem to know where to hide.
After years of calm, market turbulence has returned. The annualized daily standard deviation of the S&P 500 Index — a common measure of volatility — has been 18.6 percent from 1928 through March. But the market was much quieter from 2012 through January, with a standard deviation of 12 percent.
That quiet ended abruptly in February. The S&P 500 tumbled 8.5 percent in just five trading days from Feb. 2 to Feb. 8, and its standard deviation has spiked to 23.4 percent since February.