What Is Polymarket? How Crypto Prediction Markets Work and What the Odds Mean

September 3, 2026

WRITTEN BY

Crypto investor and blockchain researcher

Polymarket is a prediction-market platform where people trade shares tied to event outcomes. A share price is commonly read as a market-implied probability: a Yes share at 65 cents suggests the market collectively prices the outcome near 65%, not that it has a 65% chance as an established fact.

The international platform combines Yes/No outcome tokens, an exchange-style order book, pUSD collateral, Polygon smart contracts, and an external resolution process. Its separate U.S. product operates under a different legal and account structure. This guide explains those layers one at a time, including fills, fees, settlement, access, privacy, and the possibility of losing the full amount committed.So, let’s get started!

What Is Polymarket? Simple Explanation

The simplest answer to “what is Polymarket?” is that it is a marketplace for trading possible answers to questions about future events. A market may ask whether an event will occur by a stated date. Traders buy or sell outcome shares. Changing prices summarize what willing buyers and sellers currently believe at that moment.