Dollar Cost Averaging vs. Lump Sum Investing — What the Research Actually Shows
Dollar Cost Averaging vs. Lump Sum Investing — What the Research Actually Shows You just got a bonus, a tax refund, or an inheritance. Do you invest it all at once or spread it out over time? The math says one thing. Human psychology says another. Here is the honest answer — with the research, the numbers, and the CPA take on which one actually builds more wealth. Quick Answer: Lump sum investing beats dollar cost averaging (DCA) approximately two-thirds of the time according to Vanguard’s study of market data from 1926 to 2015. Morgan Stanley found the same in over 1,000 simulations. The reason is simple: markets go up more than they go down, so money invested today usually beats money sitting in cash waiting to be deployed. But the research also shows that DCA investors who actually stay in the market outperform lump sum investors who freeze and never pull the trigger. The worst outcome is not DCA. It is doing nothing. What Each Strate...