Polymarket Selects Chainalysis for On-Chain Market Surveillance

On April 30, 2026, Polymarket and Chainalysis announced an on-chain market-integrity initiative. The system uses transaction data and anomaly detection to identify trading patterns potentially consistent with insider knowledge or market manipulation, while supporting investigations with blockchain-verifiable evidence.\n\nWhy it matters for traders: Better surveillance may improve confidence in market integrity, though detection systems cannot eliminate manipulation risk entirely.\n\nSources: Chainalysis announcement; Polymarket announcement; reporting cross-checked on July 20, 2026.