[Polymarket to Conduct V2 Exchange Upgrade on April 28] Foresight News reports that the prediction market platform Polymarket will conduct a V2 exchange upgrade on April 28 at 19:00, with downtime expected to last approximately 1 hour. The V1 order book will be cleared, and all open limit orders will be canceled. Users trading via API must update to the latest version of the SDK before the upgrade, as the V1 client will no longer be usable after the upgrade.