Another technique which is similar to timing is to set a goal for a particular investment. If it is a stock fund that might be 10% per year. After a year if the fund hasn’t gone up 10% you put enough money in to bring it up to 10% more. If it has exceeded 10% you sell enough shares to bring it back down to the target. This assures that you buy during downturns and sell during peaks. But the problem with it is that it assumes you have cash on the sidelines available to prop up poorly performing investments.
If you wanted you could do the adjustments on a quarterly basis rather than yearly and the results should be better. This wouldn’t really work with my deferred compensation account since I don’t have cash available and have to make regular rather than lump sum payments. So I might try it with some of my other mutual funds starting on June 1 meaning my first adjustment wouldn’t be until September 1.