Dollar-cost averaging is the strategy of investing the same fixed amount every single month — regardless of whether the market is up, down, or sideways. It sounds boring. It's also why it works.
Most people wait for the "right time" to invest. They wait for the market to drop, or for the news to get better, or for their situation to feel more stable. Years pass. They never start.
Dollar-cost averaging eliminates this problem entirely. You invest every month, no matter what. When prices are high, you buy less. When prices are low, you buy more. Over time, your average cost per share smooths out — and the compounding does the rest.
Say you invest $100/month in VOO (S&P 500 ETF). Here's what happens in a volatile 6-month period:
| Month | VOO Price | You invest | Shares bought | Total shares |
|---|---|---|---|---|
| January | $500 | $100 | 0.20 | 0.20 |
| February | $450 | $100 | 0.22 | 0.42 |
| March | $400 | $100 | 0.25 | 0.67 |
| April | $420 | $100 | 0.24 | 0.91 |
| May | $480 | $100 | 0.21 | 1.12 |
| June | $520 | $100 | 0.19 | 1.31 |
Even though prices went DOWN in months 2 and 3, you ended up positive because those dips let you accumulate more shares at lower prices. The crash was actually good for you.
Everyone thinks they can spot the bottom. Even professional fund managers — paid millions to do exactly this — mostly fail.
The only reliable strategy is to not try to time the market. Invest consistently. Stay in. Let time do its work.
Studies show lump sum investing (putting all your money in at once) outperforms DCA about 2/3 of the time — but only if you actually have a large sum to invest. For most people, DCA wins for two reasons:
💡 The gains accelerate over time because your returns generate their own returns. At year 10, your portfolio adds more value each year than the $1,200 you put in. Your money outworks you.
ETF.PLAN tells you exactly what to buy each month. You invest, we track. Free forever.
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