Dollar-Cost Averaging: The Boring Strategy That Works

What Is Dollar-Cost Averaging (DCA)?

Instead of investing a lump sum all at once, you invest a fixed dollar amount at regular intervals — say $500 every month into an S&P 500 index fund. When prices are high, you buy fewer shares. When prices are low, you buy more. Over time, this lowers your average cost per share.

Why It Works

It Removes Emotion

The hardest part of investing is doing the right thing when it feels wrong. Buying when the market drops 20% feels terrible. But that's exactly when you're getting shares on sale. DCA automates this decision.

It Beats Most Market Timers

Study after study shows that most investors — including professionals — can't consistently time the market. Missing just the 10 best trading days over a 20-year period cuts your returns in half. DCA keeps you invested through all of them.

The Math

Imagine investing $1,000/month for 12 months in a stock that fluctuates between $80 and $120:

• Lump sum at $100: 120 shares
• DCA over 12 months: ~125 shares (you bought more when it was cheap)

Over 30 years in the S&P 500 at historical average returns, $500/month becomes approximately $1 million. The boring approach works.

When DCA Doesn't Work

• In a consistently rising market, lump-sum investing theoretically outperforms DCA about 2/3 of the time. But the 1/3 where it doesn't can be devastating.
• With individual stocks, DCA into a company going to zero just means you lose money more slowly. DCA works best with diversified funds.

How to Implement It

1. Pick a fund (total market index like VTI or S&P 500 like SPY)
2. Set up automatic monthly transfers
3. Don't look at it
4. Rebalance once a year
5. Increase your contribution when your income increases

Use SimpliInvest to evaluate individual positions you're considering adding alongside your core DCA strategy.

*This is educational content, not financial advice.*