Is Polymarket rigged?

No. Polymarket runs on public blockchain infrastructure (Polygon) where all trades are verifiable on-chain. Prices are set by supply and demand from real traders, not by Polymarket itself. However, the market is not always accurate. Prices can be temporarily moved by large traders (whale manipulation), and some market resolutions have been controversial when the UMA oracle vote produced disputed outcomes. The platform itself does not manipulate prices or outcomes.