What is dollar-cost averaging?
In one line: Dollar-cost averaging is investing the same dollar amount on a fixed schedule, like every month, no matter what the price is.
A simple example
You put $200 into a fund on the first of every month.
| Month | Price per share | Shares bought |
|---|---|---|
| 1 | $20 | 10 |
| 2 | $25 | 8 |
| 3 | $16 | 12.5 |
Total spent: $600. Total shares: 30.5.
Your average cost: $600 ÷ 30.5 = $19.67 a share. The average price over those months was $20.33. Because the same $200 buys more shares when the price is low, your average cost comes out a little lower.
Check your own numbers with the average cost calculator.
Why it matters
It takes the guessing out of timing. You don't need to know if today is a good day to buy. The schedule decides.
It also builds a habit. Small, steady amounts add up, and any growth can compound over time. See how monthly amounts grow in the compound interest calculator.
A common mistake
Thinking it protects you from losses. It doesn't. If the fund falls for years, you still lose money on paper. Dollar-cost averaging spreads out when you buy. It doesn't make a weak investment strong.
It's also not the same as adding to a losing trade. Topping up a short-term trade that hit trouble, with no stop, is a different thing. That's a sizing problem, not a schedule.
Pick an amount you won't need soon, and a date you'll stick to. Automatic transfers make the habit easy.
Questions
Is dollar-cost averaging better than investing all at once?
Not always. Studies often find a lump sum ends up ahead more often when markets rise over time, because the money is invested sooner. Dollar-cost averaging can feel easier and spreads out timing risk.
How often should you invest with dollar-cost averaging?
Monthly is common, often lined up with payday. Weekly or every two weeks works too. Watch for fees on each purchase.
Does dollar-cost averaging work for crypto?
The math works the same on any asset. But crypto can swing far more than a stock fund, so the ride can be much bumpier.
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