In this guide
Key takeaway: Polymarket is a decentralised prediction market where traders buy YES/NO shares on real-world events using USDC on the Polygon blockchain. Smart contracts handle all settlements automatically.
How does Polymarket work? Fundamentally, Polymarket functions as a prediction exchange: rather than wagering against a fixed bookmaker spread, participants trade directly with one another who hold opposing views. Market prices continuously shift to reflect what the broader community believes will occur — adjusting instantly as fresh information emerges.
The basics: prediction markets
In a prediction market, you acquire shares representing possible outcomes. Each share returns $1 upon a YES resolution, or $0 for a NO resolution. Purchasing a YES share for 40 cents ($0.40) signals your conviction that the event has a 40% probability of occurring. Success means your capital multiplies. Failure means your investment evaporates.
Polymarket differs from conventional sportsbooks by eliminating the house edge (the "vig"). Prices emerge entirely from what buyers and sellers are willing to exchange.
How Polymarket uses blockchain
Polymarket operates atop the Polygon blockchain (a layer-2 scaling solution layered above Ethereum). This architecture delivers:
- Complete transparency — every transaction is auditable and recorded on-chain
- Automated execution — smart contracts govern funding, order matching, and distributions
- Custody independence — the Polymarket organisation cannot seize assets or alter results
- Rapid finality — payouts complete within minutes rather than business days
USDC: the currency of Polymarket
Polymarket exclusively operates in USDC (USD Coin), a stablecoin maintaining a 1:1 peg with the US dollar. Your account balance remains insulated from cryptocurrency price swings — one USDC perpetually equals one dollar.
How markets resolve
Once an event's outcome becomes established, Polymarket employs the UMA Oracle (Universal Market Access) to finalise positions. An appointed "proposer" posts the resolution; a 2-hour challenge period follows; absent objections, settlement becomes binding. Should disputes arise, UMA token holders participate in governance voting — a community-driven resolution mechanism.
Getting started on Polymarket
- Create an account — register via email and undergo identity verification
- Deposit USDC — fund through MoonPay, conventional banking, or your existing cryptocurrency holdings
- Browse markets — explore elections, athletics, blockchain developments, entertainment and beyond
- Buy shares — select YES or NO and specify your investment amount
- Track and exit — liquidate your holdings whenever you choose before the market settles
PolyGram streamlines this workflow through an application designed for mobile users and passwordless email authentication. Start trading on PolyGram →
Why Polymarket prices are accurate
Prediction markets have repeatedly surpassed conventional surveys and specialist commentary in forecast precision. Throughout 2024's presidential campaign, Polymarket's probability assessments demonstrated superior accuracy relative to leading polling organisations. The mechanism is straightforward: financial incentives compel participants to form unbiased judgements.