Polymarket is reportedly switching to time-weighted average pricing after a study linked roughly $8.2 million of manipulation to its markets. For users of prediction markets, this is a meaningful change: the price used to settle or judge a market should be harder to distort with a brief, well-timed trade.
A time-weighted average price, or TWAP, takes an average over a set period instead of relying on one moment in the market. That matters when a thin or fast-moving market can be pushed around near a key deadline. A trader who can temporarily move a price may be able to influence perceptions, trigger other users’ orders, or exploit settlement mechanics. Averaging prices over time raises the cost and difficulty of that playbook.
This is not a guarantee that prediction markets are now manipulation-proof. Bad data sources, low liquidity, unclear market rules and coordinated trading can still create unfair outcomes. It also means users should read each market’s settlement terms closely: a TWAP can reduce the impact of a last-minute spike, but it may make outcomes less intuitive for anyone expecting the final visible price to decide everything.
The broader signal is risk reduction, not a reason to chase a token or assume cleaner markets automatically mean better returns. Active Polymarket traders, market makers and builders of on-chain trading products should care most. Better price design can strengthen trust, but only if the platform applies it consistently and makes the rules clear before users put money at risk.