So How Bad is Dollar-Cost-Averaging? My Own Study of VFINX from

First of all, I am a believer of dollar-cost-averaging (DCA) and have been taking this approach ($100 every month) ever since I starte dinvesting in mutual funds. The reasons I do DCA are, 1) conventional wisdom tells me that by spreading the investments throughout the year,I don't have to guess when is the right time to enter as nobody really knows whether now is a high or a low; 2) since I have a dozen of funds that I invest regularly, it's a little hard for me to put thousands of dollars right away at any time of the year. So I choose DCA and it worked quite well for me so far. However, since I have nothing to compare with, I don't know how good my investments are or if I couldhave done any better by taking another approach: invest $1,200 at the beginning of the year (lump-sum) into each found and forget about ittill next January.

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