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Dollar-Cost Averaging: Investing a Fixed Amount on a Schedule

For educational purposes only; not investment advice.

Direct answer

Section titled “Direct answer”

Dollar-cost averaging, or DCA, means investing a fixed amount at regular intervals, regardless of short-term market price.

Its main benefit is behavioral: it reduces the pressure to pick the perfect entry point. It is not a guarantee of profit and does not eliminate the risk of buying an asset that performs poorly for a long time.

How it works

Section titled “How it works”

With DCA, the same dollar amount buys more shares when prices are lower and fewer shares when prices are higher. Over time, purchases are spread across different market levels instead of concentrated on one date.

DCA is often used with diversified funds, retirement plans, and long-term index strategies because those vehicles are easier to buy repeatedly and are less dependent on one company’s survival.

The trade-off is that if markets rise steadily, investing a lump sum earlier may outperform DCA because more money was exposed to the market sooner. DCA prioritizes execution stability over maximum immediate market exposure.

Example

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An investor commits $500 per month to a broad index fund.

If the fund trades at $100, the investor buys 5 shares. If it falls to $80, the same $500 buys 6.25 shares. If it rises to $125, the investor buys 4 shares.

The investor did not predict the market; the schedule created a repeatable buying process.

Risks

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  • Asset-quality risk: DCA into a poor asset can still produce poor results.
  • Opportunity cost: Holding cash while averaging in can underperform a rising market.
  • Behavior risk: Stopping contributions during downturns can undermine the strategy.
  • Concentration risk: DCA does not fix lack of diversification.
  • Fee and tax risk: Frequent purchases may create costs or tax records depending on account type.

Common misconceptions

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DCA does not guarantee a lower average cost than lump-sum investing.

DCA is not the same as never reviewing the investment. Asset allocation, fees, diversification, and goals still matter.

DCA is not only for bear markets. Its value is having a plan before volatility arrives.

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Sources

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  • Investor.gov and SEC: dollar-cost averaging, asset allocation, diversification, mutual fund, and ETF investor education.