The China-Taiwan military conflict before 2027 contract on Polymarket experienced a sharp swing. At around 1:44 PM UTC on July 24, the Yes probability hit 14.45%, hovered near that level for 14 minutes, then began sliding. At press time, it had fallen back to 9%.
Over the prior 24 hours, the contract had traded in a narrow range between 4.4% and 4.55%. The jump from 4.5% to 14.45% represents a roughly 3x increase in a very short period.
Thin book: a single order can move the price
Was there a major news event or insider tip? The exact cause is unclear, but clues may lie in trading volume. The market has accumulated total volume of about $2.84 million, but recent liquidity is extremely thin: 24-hour volume was just $24,800, 7-day volume $154,000, order book depth $50,600, and open interest $505,000.
At this scale, a single modest buy order can push the probability from single digits to double digits in minutes. Once counterparties appear or the buyer stops, the price slides back. The brief spike likely reflects a liquidity event, not a collective reassessment.