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Polymarket will upgrade on April 28th: collateral assets will be migrated to pUSD, and trading will be paused for approximately 1 hour.
BlockBeats News, April 27 — Polymarket announced that on April 28, 2026, around 19:00, the trading platform will undergo an upgrade, during which trading will be paused for about 1 hour. This upgrade includes a new generation of trading contracts (CTF Exchange V2), reconstruction of the order book, and the introduction of a new collateral token system.
After the upgrade, the platform will migrate from USDC.e to the new collateral token pUSD (Polymarket USD), which is an ERC-20 asset on Polygon and is supported on-chain 1:1 with USDC. The protocol will still settle in native USDC to improve capital efficiency and scalability.
Most users do not need to take additional action; the frontend will automatically handle the migration, requiring only one authorization. During the upgrade, all existing order books will be cleared, and users will need to re-place their orders after the upgrade, but account balances will be automatically inherited. The new architecture optimizes order matching, fee calculation, and lifecycle management, reduces Gas costs, and addresses previous transaction failures caused by nonce and balance verification issues. The new contracts have been audited by Cantina and Quantstamp, with open source code and a bug bounty program.