Thinking About Risk: A Practical Framework Explained
Understand a practical approach to risk that covers key concepts like expected value and diversification.
What is this page about?
A practical framework for thinking about risk, defined as exposure to probabilistically varying outcomes with two components, probability and magnitude, and distinguished from danger, uncertainty, and volatility (using Knight's risk-versus-uncertainty distinction). It covers expected value and expected utility, how psychology distorts risk perception (availability, loss aversion, scope insensitivity, overconfidence), tail risks and asymmetry, the Kelly criterion, diversification, black swans and fat tails, and a six-step decision framework centred on avoiding catastrophic or irreversible outcomes.
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Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.
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0.99^70 is about 0.495, so ~50% chance of ruin over 70 years, not near-certainty
BeforeA 1% chance of bankruptcy per year means near-certain bankruptcy within 70 years
AfterA 1% chance of bankruptcy per year means about a 50% chance of bankruptcy within 70 years
Why: Verified already correctly fixed in body content (about a 50% chance, mathematically consistent with 0.99^70 ~= 0.495). FAQ and excerpt do not mention this calculation. No further action needed.
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