Category: Trading Strategies
Dollar-Cost Averaging Strategy
Dollar-cost averaging (DCA) involves investing fixed amounts at regular intervals regardless of price. It's simple, effective, and removes the stress of market timing.
[DEFINITION] Dollar-Cost Averaging: An investment strategy where you invest a fixed dollar amount at regular intervals (weekly, monthly) regardless of market conditions.
### How DCA Works
**The math:**
When you invest a fixed amount:
- High prices = fewer shares bought
- Low prices = more shares bought
- Average cost per share ends up below the average price
[EXAMPLE] $500 monthly investment in a stock:
| Month | Price | Shares Bought |
|-------|-------|---------------|
| Jan | $50 | 10 |
| Feb | $40 | 12.5 |
| Mar | $45 | 11.1 |
| Apr | $55 | 9.1 |
Average price: $47.50
Your average cost: $46.51 (better than average price!)
### Benefits of DCA
[KEY] DCA removes the biggest enemy of investors—themselves. It eliminates emotional decision-making and timing stress.
**Psychological benefits:**
- No stress about "right time to buy"
- Automatic habit building
- Removes market timing temptation
- Easier to stick with long-term
**Financial benefits:**
- Lower average cost than random lump sum
- Captures dollar-cost averaging discount
- Consistent investing builds wealth
### DCA vs. Lump Sum
**Lump sum:** Invest all money at once
**DCA:** Spread investment over time
**Research shows:**
- Lump sum wins ~65% of the time (markets trend up)
- DCA provides psychological comfort
- DCA better if market drops soon after investment
[TIP] If you can't stomach investing a lump sum, DCA is better than not investing at all. Done is better than perfect.
### Implementing DCA
**Practical steps:**
1. Set up automatic transfers from bank
2. Choose investment frequency (weekly or monthly)
3. Select your target investments (index funds ideal)
4. Don't look at portfolio daily
5. Rebalance annually
**Best investments for DCA:**
- S&P 500 index funds (VOO, SPY)
- Total market funds (VTI)
- Target-date retirement funds
[WARNING] DCA doesn't protect against prolonged bear markets or poor investment choices. It reduces timing risk, not investment risk.
### Value Averaging (Advanced DCA)
[DEFINITION] Value Averaging: Adjusting investment amounts to keep portfolio growth on target—invest more when prices fall, less when prices rise.
**Value averaging example:**
Target: Portfolio grows $500/month
- Month ends below target: Invest more
- Month ends above target: Invest less (or nothing)
More aggressive than DCA but requires more monitoring.
### When to Stop DCA
**Keep going when:**
- You have regular income to invest
- You're building toward long-term goals
- You're not yet retired
**Consider stopping when:**
- Approaching retirement (shift to preservation)
- Major life changes requiring cash
- Investment thesis changes
[EXERCISE] You have $12,000 to invest. Option A: Invest all now. Option B: Invest $1,000/month for 12 months. If you expect the market to rise 10% this year, which is mathematically better? What if you're nervous about investing? |ANSWER| Mathematically, Option A—money in the market longer captures more of the expected 10% gain. But if you're nervous, Option B reduces regret risk and psychological pain if the market drops early. Either beats not investing.
[SCENARIO] You've been DCA-ing into the S&P 500 monthly. The market drops 30% in a crash. Your portfolio is down significantly. Some people stop investing or sell. What should you do?
Keep investing! This is exactly when DCA shines. Your fixed $500/month now buys 43% more shares than before the crash. Those shares bought at low prices will compound for decades. Stopping or selling during crashes is the #1 wealth destroyer for individual investors. DCA removes the temptation to make this mistake.
Knowledge Check Quiz
Question: What happens to the number of shares you buy with DCA when prices fall?
Take the interactive quiz on our website to test your understanding.