Dollar-cost averaging is not a panacea that eliminates the risk of investing in common stocks. It will not save your 401(k) plan from a devastating fall in value during a year such as 2008, because no plan can protect you from a punishing bear market. And you must have both the cash and the confidence to continue making the periodic investments even when the sky is the darkest. No matter how scary the financial news, no matter how difficult it is to see any signs of optimism, you must not interrupt the automatic-pilot nature of the program. Because if you do, you will lose the benefit of buying at least some of your shares after a sharp market decline when they are for sale at low prices. Dollar-cost averaging will give you this bargain: Your average price per share will be lower than the average price at which you bought shares. Why? Because you’ll buy more shares at low prices and fewer at high prices.