Polymarket$3.29BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
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Updated Today
If the number of teams achieving an upset (based on seeding) in the Round of 16 of the men's college basketball tournament is exactly 8, then the market resolves to Yes.
As of March 18, 2026, the Kalshi odds for Will there be at least 1 upset in the Round of 16? are: 1+ upsets: 90%, 2+ upsets: 53%, 3+ upsets: 34%, 5+ upsets: 23%, 4+ upsets: 21%. These probabilities are derived from real-money trading and update in real time.
Will there be at least 1 upset in the Round of 16? 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.
