Polymarket has selected Chainalysis to power a first-of-its-kind, fully on-chain market integrity monitoring system aimed at detecting insider trading and market manipulation across its prediction markets.The rollout lands two days after Polymarket’s April 28 exchange upgrade, which introduced new smart contracts, a rebuilt order book, and pUSD, an ERC-20 collateral token on Polygon backed 1:1 by USDC.Record trading volumes — including a single-day high of $425 million and more than $7 billion in monthly volume this year — are driving the push toward institutional-grade surveillance and compliance.