TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 18, 8:10 PM EST
Kalshi
Three professional golfers compete in a 3-ball matchup during the first round of the 2026 U.S. Open. The golfer with the lowest score for the round wins the matchup.
The winner of the 3-ball matchup is determined by the lowest score posted during the first round of the 2026 U.S. Open. If multiple participants tie for the lowest score at the end of the round, the Yes payout is divided equally among all tied participants, with each receiving $1/N rounded down to the nearest cent, where N equals the number of tied participants. The No payout equals $1 minus the Yes payout. If any golfer withdraws prior to teeing off, all markets resolve to fair market value.
Prediction market odds and traditional sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and manage risk, while prediction markets like this one aggregate trader beliefs through continuous price discovery. Traders here profit by identifying mispricings relative to sportsbooks, so this market can sometimes offer sharper odds than fixed betting lines. The comparison reveals whether professional and casual traders see value differently than bookmakers do.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell contracts representing each outcome. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each contract reflects the probability traders assign to that player winning the three-ball matchup, ranging from 0 to 100 cents. As new trades execute, prices adjust in real time, allowing the market to incorporate breaking news, course conditions, or player form updates instantly. Liquidity and trading volume determine how tightly prices cluster around fair value.
This market resolves around Jun 18, 2026, once the first round of the tournament concludes and scores are finalized. The outcome is determined by comparing the final scores of the three golfers in the pairing, with the player posting the lowest score declared the winner. Resolution is confirmed once the event result is verifiable from credible public reporting. Traders holding contracts on the winning player receive full payout, while other positions expire worthless.
Several factors can shift prices before the tournament begins. Recent tournament results, player injury reports, and course-condition updates all influence trader positioning. Weather forecasts closer to the event date—particularly wind and rain—can significantly impact expected scoring and alter odds. Betting action from sharp money or public sentiment swings may also drive price movement. Finally, any last-minute withdrawals or lineup changes involving the three players in this pairing would immediately reprrice the market.