What is Dollar-Cost Averaging (DCA)?
Definition
Dollar-Cost Averaging (DCA) is an investment strategy in which an investor divides up the total amount to be invested across periodic purchases of a target asset in an effort to reduce the impact of volatility on the overall purchase.
In simpler terms: Instead of trying to guess when the stock market is at its lowest, you invest a fixed dollar amount (like $200) every single month, no matter what the market is doing.
How It Works
Because you are investing a fixed dollar amount, you automatically buy more shares when prices are low, and fewer shares when prices are high. This mathematically averages out your purchase price over time. For more on building disciplined long-term investing habits, see SEC investor education.
Example of DCA
Let's say you invest $100 every month into Company XYZ:
- January: Stock price is $20. You buy 5 shares.
- February: Stock price falls to $10. You buy 10 shares.
- March: Stock price rises to $25. You buy 4 shares.
Total Invested: $300
Total Shares Owned: 19 shares
Average Cost Per Share: $15.78
Even though the price ended up at $25, your average cost was only $15.78 because you bought so many shares when it crashed in February.
Key Benefits of DCA
- Removes Emotion: You don't have to panic during a market crash. A crash just means stocks are "on sale."
- No Market Timing: Nobody can accurately predict the stock market. DCA guarantees you participate in long-term growth.
- Easy to Automate: Most brokerages allow you to set up automatic weekly or monthly deposits, meaning you build wealth on autopilot.
DCA vs. Lump Sum Investing
The alternative to DCA is "Lump Sum" investing—investing all your money at once. While historically slightly outperforms DCA because markets tend to go up over time, DCA is far superior for managing psychological risk and regret.
Read our full guide on how to use DCA for stress-free investing.
