“prediction markets lost $500 million when vague rules let oracles pick winners”
Catalog of 14 resolution failures over 18 months at Polymarket and Kalshi affecting over $500M in volume, including the $242M Zelenskyy-suit market, the $120M TikTok ban, and the $47M Cardi B halftime market that resolved yes on Polymarket and no on Kalshi. Groups the failures into four patterns: vague criteria, decentralized oracle capture (UMA token cap below disputed volume), centralized operator discretion, and cross-platform divergence. Useful reference for anyone designing resolution mechanisms or underwriting oracle risk.
Some technical background helpful
Platforms mentioned: Polymarket, Kalshi