Larry Swedroe

There is at least one piece of historical data that should convince skeptics that trying to "time the market" is most likely an exercise in futility. Out of the 936 months covering the period 1926-2003, the returns for the best 66 months (7 percent) averaged over 11 percent. The returns for the remaining 870 months (93 percent) averaged less than 0.02 percent per month.