Dollar-Cost Averaging (DCA)

FundamentalGeneral Investing2 min read

Quick Definition

Investing a fixed amount at regular intervals regardless of price, reducing the impact of market volatility over time.

What Is Dollar-Cost Averaging (DCA)?

Dollar-Cost Averaging (DCA) is an investment strategy where you invest a fixed dollar amount at regular intervals, regardless of the asset's price. This approach reduces the impact of volatility and removes emotion from investing.

How It Works:

  • Invest same amount each period (weekly, monthly)
  • Buy more shares when prices are low
  • Buy fewer shares when prices are high
  • Average cost per share tends to be lower than average price

Example: $500 monthly investment over 4 months:

MonthPriceShares Bought
1$5010 shares
2$4012.5 shares
3$2520 shares
4$5010 shares
TotalAvg $41.2552.5 shares

Average price: $41.25 | Your average cost: $38.10/share

Benefits:

  • Removes market timing stress
  • Automatic, disciplined investing
  • Reduces impact of volatility
  • Prevents emotional decisions
  • Perfect for 401(k) contributions

DCA vs. Lump Sum: Studies show lump sum investing beats DCA ~66% of the time (because markets rise more often than fall). However, DCA provides peace of mind and is better than not investing at all.

Best For:

  • Beginning investors
  • Regular income (paycheck investing)
  • Volatile markets
  • Those who worry about timing

Dollar-Cost Averaging (DCA) Example

  • 1401k contributions are automatic DCA
  • 2Investing $500/month in S&P 500 index fund