📖Duan Yongping
Probabilistic Thinking
Think in probabilities, not certainties.
Think in probabilities, not certainties. Every investment has a range of possible outcomes. Weight your decisions by the expected value of each scenario.
🏠 Everyday Analogy
📖 Core Interpretation
In Probabilistic Thinking, Duan Yongping focuses on the gap between price and value. Returns come from paying less than what a business is worth, not from guessing short-term market moves.
💎 Key Insight：Expected value calculations guide rational decisions.
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❓ Why It Matters
Ignoring valuation turns even good companies into poor investments. Overpaying compresses future returns and leaves little margin when assumptions are wrong.
🎯 How to Practice
Estimate intrinsic value with conservative assumptions, set clear buy ranges, and act only when price offers a meaningful discount with acceptable downside.
⚠️ Common Pitfalls
Confusing a low price with true cheapness
Using one metric without business context
Overly optimistic assumptions that erase margin of safety
📚 Case Studies
1
NetEase Dot-Com Crash (2000)
NetEase plummeted over 90% during the dot-com bust amid fears Chinese internet firms would fail.
✨ Outcome：Duan ignored market panic, focused on fundamentals, increased his stake, and the investment later became a multi-bagger.
2
Apple iPhone Doubts (2008)
Global crisis and skepticism about iPhone margins led to sharp volatility and frequent negative headlines on Apple.
✨ Outcome：He ignored short-term noise, held his position, and Apple’s earnings and stock price compounded substantially over the following decade.
📌 Save this principle as your rule
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