Dollar-cost averaging is the habit of investing a fixed sum on a fixed schedule, regardless of price. It's dull on purpose — and that's exactly why it works.
How it works
Instead of trying to pick the perfect moment, you commit to investing, say, $200 on the first of every month. When prices are high your $200 buys fewer shares; when prices are low it buys more. Over time this naturally pulls your average cost per share below the average price.
Example: investing $200 across three months at prices of $20, $10 and $25 buys 10, 20 and 8 shares — 38 shares for $600, an average cost of about $15.79, below the simple average price of $18.33.
Why it helps
| Benefit | Why it matters |
|---|---|
| Lowers timing risk | You never bet everything at a single, possibly unlucky, moment. |
| Removes emotion | The schedule decides for you, so fear and greed don't. |
| Builds the habit | Automatic, regular investing compounds over decades. |
The honest caveat
If you already have a lump sum and a long horizon, investing it all at once has, on average, beaten spreading it out — because markets rise more often than they fall. Dollar-cost averaging's real strength is for money you earn over time, and for the discipline and peace of mind it gives nervous investors.
