Polymarket$3.29BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$404.59MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$27.64MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.
Updated Today
If Tarik Samman wins the nomination for the Democratic Party to contest the 2026 MA-05 House seat, then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Will Jonathan Paz be the Democratic nominee for MA-05? are: Katherine Clark: 88%, Jonathan Paz: 12%, Tarik Samman: 5%. These probabilities are derived from real-money trading and update in real time.
Will Jonathan Paz be the Democratic nominee for MA-05? 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.
