Traders on a prediction market priced in a world leader's death four and a half hours before the government officially confirmed it.
A gap between two different prediction markets allowed savvy investors to profit from a death by exploiting subtle rule differences. One venue's contract excluded a specific individual, which created a massive 89% price divergence when the news broke. People usually assume that markets react to news only after it becomes public and verified. This event proves that the wisdom of crowds can detect and price in secret information through the friction between competing rules. Prediction markets are becoming a more accurate source of truth than official state press releases.
Kalshi's Ceiling: Settlement Asymmetry and the Intraday Limits of Cross-Venue Repricing in Event Contracts
SSRN · 6704139
Two prediction-market venues list nominally identical contracts on the same event, but Kalshi's CFTC-registered terms exclude resolution paths involving the death of a named individual while Polymarket's do not. I exploit the February 28, 2026 strikes against Iran's Supreme Leader to identify the price effect of this settlement asymmetry. During the 21-hour news-arrival window, Polymarket's YES contract converged to 0.997 while Kalshi's identical-deadline contract halted at 0.08, a wedge of 0.89