Overview
- The academic paper published Wednesday analyzed roughly 16,000 five‑minute Bitcoin contracts and found concentrated, one‑sided order bursts on Binance in the final seconds before settlement that pushed spot prices toward favorable outcomes.
- Researchers reported fast post‑settlement price reversals and activity concentrated in thin‑liquidity hours, with the pattern largely disappearing in 15‑minute contracts, indicating the problem stems from settling on a single timestamped price.
- The study documented measurable transfers from retail accounts to more sophisticated traders but gave conflicting profit estimates in coverage, with figures reported at about $8.2 million in one account and roughly $1.28 million in another.
- Polymarket defended its use of multiple oracles and said it will move some markets to longer windows or time‑weighted pricing to reduce exploitability, while the paper stopped short of proving intent or linking Binance traders directly to Polymarket wallets.
- The findings raise broader market‑structure and regulatory questions as Cboe and Nasdaq expand asset‑linked event contracts and U.S. regulators, including the CFTC, weigh how settlement design should be supervised to protect ordinary users.