For more detail, see how the three-fund portfolio performs over 30 years.
Here’s the thing most people miss about this topic.
Dollar-cost averaging (DCA) is one of the most recommended investment strategies for beginners — and unlike most popular finance advice, the recommendation has a solid rational basis. It’s not the optimal strategy under all conditions, but it’s one of the most realistically achievable strategies for people who are not professional investors and who have better things to do than time the market. For more detail, see historical DCA vs lump sum analysis.
This is one of those topics where the conventional wisdom doesn’t quite hold up.
This is one of those topics where the conventional wisdom doesn’t quite hold up.
I’ve spent a lot of time researching this topic, and here’s what I found.
Disclaimer: This post is for educational purposes only and does not constitute financial or investment advice. Investing involves risk, including possible loss of principal. Consult a licensed financial advisor before making investment decisions.
What DCA Actually Means
Dollar-cost averaging means investing a fixed amount of money at regular intervals — regardless of market price. If you invest 200,000 won per month into an index fund, you buy more shares when prices are low and fewer shares when prices are high. Over time, your average cost per share tends to be lower than the average market price over the same period. [3]
Related: index fund investing guide
See also: index fund guide
See also: Dollar Cost Averaging Myths [2026]
See also: ADHD and Loneliness: The Hidden Emotional Cost of the Condition
See also: Behavioral Finance Biases [2026]
See also: Dollar-Cost Averaging vs Lump Sum Investing [2026]
Last updated: 2026-03-31
Your Next Steps
- Today: Pick one idea from this article and try it before bed tonight.
- This week: Track your results for 5 days — even a simple notes app works.
- Next 30 days: Review what worked, drop what didn’t, and build your personal system.
Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about a medical condition.
My take: the research points in a clear direction here.
Does this match your experience?
References
- Bernstein Research (2008). Entering the Market. Bernstein Private Wealth Management. Link
- Brown, H. (2021). Dollar Cost Averaging Returns Estimation. Academic Paper. Link
- Sang, S., Bai, R., & Li, H. (Year not specified). The Dynamic Relationship Between Market Volatility and Dollar Cost Averaging Strategy Returns: An Empirical Investigation. Atlantis Press. Link
- Vanguard (2012). Dollar-Cost Averaging Just Means Taking Risk Later. Vanguard Research Paper. Link
- Calvet, L., et al. (2023). SmartDCA: An Enhanced Dollar-Cost Averaging Strategy. Academic Paper. Link
