Dollar-Cost Averaging

Dollar-cost averaging invests a fixed amount on a schedule, buying more shares when prices are low.

Why investors care

It removes the urge to time the market and smooths your entry.

Where people go wrong

In a steady rise it lags a lump sum, but it tames regret and risk.

In the real market

In 2020, the market crashes 30% and an investor with automatic monthly contributions keeps buying through the panic — $500 a month into a falling market buys more shares each time. When the market recovers, the average cost is far below the peak, and the position profits handsomely. A friend who paused contributions “until things settle” waits for a clear signal that never comes and buys back in at the top. DCA’s edge is not math; it is keeping the money flowing when fear says stop.

Using it in practice

Set up automatic contributions so the schedule runs without decisions. If a large windfall arrives, investing it over several months can calm the nerves; just know that on average, lump-sum beats DCA in rising markets.

Example in numbers

Key takeaway

Dollar-cost averaging is a discipline, not an edge: investing a fixed sum on a schedule buys more shares when cheap and fewer when dear, which removes the urge to time the market. In a rising market a lump sum wins on average, but DCA’s real product is steady behaviour through volatility and crashes. Set the schedule on autopilot so it runs without decisions, and keep contributing through downturns, because that is exactly when the fixed sum buys the most. The plan, not the timing, is the point.

Definitions reviewed by the Investing Glossary editorial team.