Polymarket confirmed on Friday, December 19, 2025, that it has fully restored all platform services following a major disruption caused by a critical outage on the Polygon network that began during the previous trading session.
The decentralised prediction market said the incident started on December 18, when Polygon experienced block synchronisation issues that affected applications relying on its Layer 2 infrastructure.
While some users were still able to access Polymarket’s front-end interface, core trading functions were significantly impaired due to delays in on-chain data updates.
Polymarket stated that real-time market pricing and order book activity were temporarily suspended to prevent users from interacting with inaccurate or outdated information.
The company said the root cause of the outage was a failure in its data ingestion subgraphs, which are responsible for indexing blockchain events and translating them into market data.
When Polygon’s block production slowed, these subgraphs were unable to process new transactions, leading to stale prices across multiple active markets.
According to Polymarket’s status update, engineers worked continuously alongside the Polygon core team to resynchronise the affected systems and restore full functionality.
The platform confirmed that market creation, share trading, and outcome resolution tools are now operating normally following the completion of these repairs.
Polymarket also stressed that no user funds were lost and that all open positions remained secure throughout the disruption.
Industry observers noted that the incident underscores the dependency risks faced by decentralised applications built on third-party blockchain networks.
Analysts said the outage has renewed speculation that Polymarket could explore launching its own dedicated Layer 2 solution to improve long-term reliability.
The timing of the disruption was particularly sensitive, as the platform has seen a surge in activity tied to end-of-year political and macroeconomic events.
More than $100 million in combined open interest remains locked in markets linked to issues such as the Trump administration’s “Gold Card” visa programme and the S&P 500’s year-end close.
Polymarket warned that a prolonged outage could have triggered oracle-related resolution issues due to missing or delayed on-chain data.=
To reduce the risk of future disruptions, the company said it is implementing redundant data providers and enhanced monitoring to detect network anomalies earlier.
The firm added that it remains committed to maintaining a 99.9% uptime target through the end of 2025 as decentralised infrastructure continues to mature under heavy global demand.