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Dollar-Cost Averaging: The Ultimate Passive Strategy

2026-07-06
Aristockrat Research
2 min read

Dollar-Cost Averaging (DCA) is the simplest, most effective investment strategy ever discovered. It requires zero skill, zero timing, and historically beats 95% of professional fund managers.

How DCA Works

Instead of investing a lump sum all at once, you invest a fixed amount at regular intervals regardless of the stock price.

Example: You invest $500 every month into an S&P 500 ETF. When the price is high, you buy fewer shares. When the price is low, you buy more. Over time, your average cost per share is lower than the average market price.

DCA vs. Lump Sum: The Data

StrategyAverage Annual ReturnWorst YearBest Year
Lump Sum (perfect timing)11.3%-38% (2008)+32% (2013)
Lump Sum (worst timing)7.1%-52% (2008)+26% (2013)
DCA (monthly)10.1%-22% (2008)+28% (2013)

Key Insight: Lump sum investing wins about 66% of the time — BUT DCA protects you from the catastrophic 34% where you invest at the worst possible moment.

The Math Behind DCA

When you buy $500 of shares at $50/share, you get 10 shares. When the price drops to $25, your $500 buys 20 shares. Your average cost: $33.33/share — lower than the average price of $37.50.

Why Most Investors Can't Time the Market

  • Missing the 10 best days in the S&P 500 over 20 years cuts your return by 50%
  • 6 of those 10 best days occurred within 2 weeks of the 10 worst days
  • You'd have to predict both the crash AND the recovery perfectly

The DCA Checklist

  • Set up automatic monthly transfers
  • Choose a low-cost index fund (VOO, VTI, or QQQ)
  • Never skip a month, especially during crashes
  • Review allocation once per year
  • Increase contribution by 5-10% annually

How Aristockrat Enhances DCA

While DCA works brilliantly with index funds, what if you could DCA into the best-scored individual stocks? That's what Aristockrat enables — systematic investing backed by AI-driven stock selection.

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