Polymarket$3.18BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$401.77MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$25.30MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Ended
If Keir Starmer says Ukraine as part of next Prime Minister's Questions (UK House of Commons), then the market resolves to Yes.
Winner: Droneon Mar 11, 2026
As of March 18, 2026, the Kalshi odds for What will Keir Starmer say during next Prime Minister's Questions (UK House of Commons)? are: Drone: 99%, Iran: 99%, Energy: 99%, Reform: 99%, Nuclear: 99%. These probabilities are derived from real-money trading and update in real time.
What will Keir Starmer say during next Prime Minister's Questions (UK House of Commons)? is currently available on Kalshi. Check PredictMarketCap for cross-platform availability as new markets are added regularly.
Prediction market odds reflect the aggregate opinion of traders who risk real money on outcomes. The price of a share (e.g., 65¢) represents the market's implied probability (65%). Prices move as traders buy and sell based on new information, polls, and analysis.
