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Polymarket

Polymarket is the world's largest decentralized prediction market platform, built on the Polygon blockchain, where users trade binary outcome shares on real-world events using USDC as collateral. Founded in 2020, it relaunched for US users in May 2026 after securing a CFTC operating license.

Updated June 24, 2026Platforms & Tools
TL;DR
Polymarket is the dominant onchain prediction market, running on Polygon with USDC settlement and a Central Limit Order Book, now legally accessible to US traders as of 2026.

Key Points

✓Founded in June 2020 by Shayne Coplan; the CFTC fined Polymarket $1.4 million in January 2022 for operating without registration and barred US users.
✓Polymarket acquired a CFTC-registered exchange in September 2025 and officially relaunched for all US users in May 2026.
✓All collateral, settlement, and payouts are denominated in USDC on the Polygon network; Circle and Polymarket announced a transition to native USDC in February 2026.
✓In October 2025, Intercontinental Exchange (parent of NYSE) invested $2 billion at an $8 billion valuation.
✓A POLY governance token airdrop was announced for the top 20% of historical traders as part of a token launch in 2026.

How Polymarket Works

Polymarket operates as a Decentralized Prediction Market where all trades are settled by smart contracts on Polygon. To participate, users connect a Crypto Wallet such as MetaMask and deposit USDC Collateral. Each market consists of Yes/No Shares priced between $0.01 and $0.99 USDC, with that price representing the market's Implied Probability for the outcome. Polymarket uses a Central Limit Order Book (CLOB) rather than an Automated Market Maker, so traders interact with a live Order Book and benefit from tighter Bid-Ask Spread on high-volume markets. When a market resolves, the UMA Optimistic Oracle system confirms the outcome on-chain and winning shares pay out 1 USDC each.

Regulatory History and US Relaunch

Polymarket operated without CFTC registration from 2020 until a January 2022 enforcement action imposed a $1.4 million fine and required the platform to Geofencing block US users. The company subsequently acquired a small CFTC-registered exchange and clearinghouse in September 2025, which granted it a compliant US operating license. After completing that process and working through a separate DOJ inquiry that was closed without charges in July 2025, Polymarket relaunched for all US users in May 2026. This shift makes Polymarket both a Decentralized Prediction Market platform and a CFTC-Regulated Exchange, a combination unique among major prediction venues.

Infrastructure and Data Access

Polymarket provides a public Trading API with REST and WebSocket endpoints, using EIP-712-signed orders submitted to its CLOB on Polygon. Developers can access live Order Book data, trade history, and position state. Several third-party Prediction Market Aggregator tools and leaderboard sites scrape Polymarket data to build trader analytics, wallet tracking, and Leaderboard rankings. The open nature of on-chain settlement means all trade data is permanently verifiable on-chain, supporting tools for Calibration analysis and performance benchmarking. Algorithmic traders frequently use the API to implement strategies including Arbitrage across platforms.

Related Terms

Decentralized Prediction Market
A decentralized prediction market is a blockchain-based trading platform where event contracts are created, traded, and settled by smart contracts rather than a central intermediary, with collateral typically held in a cryptocurrency stablecoin. Polymarket is the most prominent example, running on the Polygon network with USDC as collateral.
Kalshi
Kalshi is a US-based prediction market exchange regulated by the CFTC as a Designated Contract Market, allowing traders to buy and sell event contracts on real-world outcomes. It was the first exchange to receive CFTC approval specifically for event contracts, launching its first markets in 2021.
USDC Collateral
USDC collateral refers to the use of USD Coin — a US dollar-pegged stablecoin issued by Circle — as the deposit, margin, and settlement currency on decentralized prediction market platforms. On Polymarket, all positions, profits, and payouts are denominated in USDC, shielding traders from cryptocurrency price volatility.
Crypto Wallet
A crypto wallet is a software application or hardware device that stores the private keys used to sign blockchain transactions, enabling users to hold, send, and receive digital assets such as USDC. On decentralized prediction markets like Polymarket, a connected wallet serves as the account, collateral vault, and identity of the trader.
UMA Optimistic Oracle
The UMA Optimistic Oracle is a decentralized truth-reporting system used by Polymarket that resolves prediction markets by assuming proposed outcomes are correct unless challenged within a 2-hour window.

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