Table of Contents
1. How Dollar-Cost Averaging Works
Dollar-cost averaging (DCA) is the systematic practice of investing a fixed dollar amount into a security or index on a consistent schedule (e.g., $500 on the 1st of every month), regardless of market headlines or short-term volatility.
3. Numerical Example: Buying During a Market Dip
Imagine investing $1,000 each month across four months during a volatile market swing:
- Month 1: Share price $100 → Buys 10.0 shares
- Month 2: Share price $50 (market drops 50%) → Buys 20.0 shares
- Month 3: Share price $80 (rebound begins) → Buys 12.5 shares
- Month 4: Share price $100 (full recovery) → Buys 10.0 shares
Total invested: $4,000. Total shares acquired: 52.5 shares. Average price paid per share: $76.19, despite the share price starting and finishing at $100. By investing a fixed dollar amount, you automatically acquired twice as many shares at the market bottom.
Key Takeaways
- DCA eliminates the stress and guesswork of trying to time market tops and bottoms.
- Automating your monthly 401(k) or IRA contribution is dollar-cost averaging in its purest, most effective form.
- For large cash windfalls, a structured 6-to-12-month DCA schedule can ease anxiety while keeping capital moving into the market.