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 Tie wins the Portland Thorns vs Seattle Reign professional NWSL soccer game originally scheduled for Mar 20, 2026 after 90 minutes plus stoppage time (does not include extra time or penalties), then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Portland Thorns vs Seattle Reign Winner? are: Tie: 4%, Seattle Reign: 4%, Portland Thorns: 4%. These probabilities are derived from real-money trading and update in real time.
Portland Thorns vs Seattle Reign Winner? 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.
