Polymarket adds TWAP settlement and $1M rewards for crypto prediction markets
Polymarket replaced single-price snapshot settlement with time-weighted average price (TWAP) resolution for short-dated crypto up/down contracts on August 7. The change applies to five-minute, fifteen-minute, and 4-hour intervals across eight cryptocurrencies. Chainlink TWAP oracles now feed the resolution price. Polymarket paired the upgrade with $1 million in liquidity rewards to deepen thin order books. The shift follows prior exploitation of snapshot pricing that allowed traders to manipulate final prices and drain funds.
Polymarket's TWAP switch directly closes the 30-second window that let traders spike prices and drain millions in prior incidents. Short-duration crypto contracts now resolve against a harder-to-manipulate average, restoring integrity for traders holding near-expiration positions. The $1 million liquidity reward targets the thin order books that made manipulation profitable in the first place.
This self-policing move is timed against multiplying regulatory threats: a Senate bill would ban sports event contracts, and state attorneys general have already pierced federal preemption shields elsewhere. Polymarket cannot control which regulator acts first, but it can deny them an easy integrity complaint. Chainlink's oracle infrastructure is available to rivals too, so the advantage is temporary. The platform that settles most reliably will keep sophisticated traders as federal scrutiny intensifies.
Polymarket's TWAP rollout and liquidity incentives follow its earlier August 7 pricing switch and arrive alongside its pursuit of a $20 billion valuation, as the platform races to close manipulation gaps before regulators or competitors exploit them.