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Personal Finance

What is the Rule of 100?

Quick Answer

The Rule of 100 is a heuristic for asset allocation: subtract your age from 100 to get the percentage of your portfolio in stocks, with the remainder in bonds. At 40 you'd be 60/40 stocks/bonds.

Stock allocation by age using the Rule of 100 and the more aggressive Rule of 110/120.
Warren Team
Updated April 26, 2026
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Important Disclaimer:

The information provided is for educational purposes only and should not be considered as personalized financial advice. Warren is a registered investment advisor. Past performance does not guarantee future results. Please consult with a qualified financial advisor before making investment decisions.

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