Dollar Cost Averaging

Investment Vehicles High Relevance

An investment strategy of investing a fixed dollar amount at regular intervals (weekly, monthly, quarterly) regardless of share price. Automatically purchases more shares when prices are low and fewer shares when prices are high, resulting in a lower average cost per share over time compared to the average share price.

Example

An investor commits to investing $500 monthly in a mutual fund. In January, shares cost $25 (buys 20 shares). In February, shares drop to $20 (buys 25 shares). In March, shares rise to $50 (buys 10 shares). Total investment: $1,500 for 55 shares = $27.27 average cost per share, which is lower than the $31.67 average share price.

Common Confusion

Dollar cost averaging does NOT guarantee profits or protect against losses in declining markets. Students often confuse it with value averaging (where investment amounts vary) or wrongly believe DCA always outperforms lump-sum investing. DCA is also NOT suitable for clients who already have a large sum to invest and need immediate market exposure.

How This Is Tested

  • Identifying client situations where dollar cost averaging is appropriate (regular income, limited lump sum, high market volatility)
  • Calculating average cost per share when given periodic investment amounts and share prices
  • Understanding DCA advantages: reduces timing risk, enforces discipline, removes emotional decision-making
  • Recognizing when DCA is NOT suitable: client has lump sum available, immediate diversification needed, declining market conditions
  • Distinguishing dollar cost averaging from market timing and lump-sum investing strategies

Example Exam Questions

Test your understanding with these practice questions. Select an answer to see the explanation.

Question 1

David, age 32, is a software engineer earning $110,000 annually with consistent bi-weekly paychecks. He has $5,000 in an emergency fund and wants to start investing for retirement but has never invested before and is concerned about "buying at the wrong time" due to recent market volatility. He can comfortably save $800 per month. Which investment approach would be most appropriate for David?

Question 2

What is the primary advantage of a dollar cost averaging investment strategy?

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Question 3

An investor uses dollar cost averaging to invest $1,200 per quarter in a mutual fund. Over four quarters, the share prices were $40, $30, $24, and $48. What is the average cost per share for the investor?

Question 4

All of the following statements about dollar cost averaging are accurate EXCEPT

Question 5

A client receives a $200,000 inheritance and asks about using dollar cost averaging to invest the funds over 12 months instead of investing the lump sum immediately. Which of the following are valid considerations when evaluating this strategy?

1. Dollar cost averaging may reduce anxiety about investing the full amount at a market peak
2. In rising markets, dollar cost averaging will likely underperform immediate lump-sum investment
3. The uninvested portion awaiting future DCA contributions is exposed to opportunity cost
4. Dollar cost averaging is always the most suitable approach for inheritance investments

💡 Memory Aid

Think of DCA like grocery shopping with a fixed budget: If milk costs $4, you buy 5 gallons for $20. If milk drops to $2, you buy 10 gallons for $20. If milk rises to $5, you buy 4 gallons for $20. Your average cost stays lower than the average price because you automatically buy more when cheap, less when expensive. Same dollars, better average!

Related Concepts

This term is part of this cluster:

Where This Appears on the Exam

This term is tested in the following Series 65 exam topics: