Polymarket paused trading on August 22, 2026 at 1:13 PM due to a major outage affecting its Trading API (CLOB). The incident was identified nine minutes after it began, at 1:22 PM. The platform's status page flagged the disruption as a major outage.

Trading halts on a major prediction market freeze user capital and can shift volume to competitors like Kalshi or ForecastEx if the outage extends. The CLOB-specific failure also raises questions about Polymarket's infrastructure resilience during high-activity periods.