What dollar cost averaging actually means
Dollar cost averaging (DCA) is the practice of investing a fixed amount of money at regular intervals — say, $300 on the first of every month — regardless of what the market is doing. No timing, no guessing, no watching charts. Just consistency.
The strategy works because it removes emotion from investing. When prices drop, your $300 buys more shares automatically. When prices rise, you buy fewer. Over time, this results in a lower average cost per share than most people achieve by trying to time their purchases.
The S&P 500 fact that matters: Missing just the 10 best trading days in a 20-year period reduces total returns by nearly 50%. DCA investors never miss those days — they're always invested.
Why it beats market timing
Academic research consistently shows that the overwhelming majority of active traders — including professional fund managers — underperform simple index fund investing over 10+ year periods. The problem isn't intelligence. It's that markets are unpredictable in the short term, and the costs of being wrong (both financially and emotionally) compound against you.
- Automate it: Set up automatic monthly transfers to your Roth IRA or brokerage account
- Invest on payday: Before you have a chance to spend the money
- Never pause during downturns: That's exactly when DCA works best
- Stay consistent for years: The compounding effect takes time to become significant
See DCA in action. Our simulator lets you practice buying through market events with play money.
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