Eli: How would you like the money? simvastatin hintavertailu The CBOE Volatility Index, a popular gauge of Wall Street anxiety, closed at 14.53 Tuesday, which is historically low and represents expectations for relative calm in markets. The VIX has not traded over 18 since June and 30-day historical volatility for the S&P 500 Index is low at 9.8 percent.