Remember volatility? Well, it's back. Take a look, for instance, at the last three months of the Dow Jones Industrial Average.
Between Aug. 17 and Oct. 9, the average daily range — the difference between the intraday high and the intraday low — was 177 points. Between Oct. 10 and Nov. 16, the average daily range was 455 points, 2.5 times greater.