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Market Probabilities Are NOT Real Probabilities

Lihong·May 3, 2026·Twitter
market prices reflect capital-weighted beliefs, not equal-weighted probabilities

Why It's Worth Reading

Analyzes three structural reasons prediction market prices diverge from true probabilities even with rational participants: favorite-longshot bias from Kelly betting, risk-premium distortion from market correlation, and risk-neutral forward pricing in long-dated contracts. Argues markets still outperform individuals because they weight capital-backed beliefs rather than equal-weighted opinions.

Extensive technical background assumed

Concepts

Platforms mentioned: Polymarket

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