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Prediction Market Handbook

Accuracy study Break-even calculator About

Guides

Basics

How to Read Prediction Market Odds: Price, Spread and Fees

Legal

Are Prediction Markets Legal in the US? (November 2026)

Platforms

Kalshi vs Polymarket: Fees, Access and Resolution Compared

Perspective

Why New Prediction Market Traders Should Start as Makers

Data and tools

How accurate are prediction markets?
Break-even calculator

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Plain answers about prediction markets. Not financial or legal advice.