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Does dollar cost averaging really work?
Dollar cost averaging moderates risk. But you pay for this by giving up the chance for higher gains. If you took a hundred people and randomly had them fully buy into the market over a decade period, some of those people will do very well (relative to the rest) while others will do very poorly (relatively). If you dollar cost average, your performance would fall into the middle so you don't fall into the bottom (but you won't fall into the top either).