TOTAL VOLUME:
$134b
24H VOL:
$107,351,958
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,416,970,024
400,720
Markets across
30,097
events
MATCHED EVENTS:
2,633
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 18, 4:00 PM EST
Kalshi
Three professional golfers compete in a 3-ball format during the first round of the 2026 U.S. Open, with the player posting the lowest score declared the winner of 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 sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets aggregate trader beliefs through continuous price discovery. This market may show different implied probabilities than traditional golf sportsbooks, especially as new information emerges. Comparing the two can reveal where professional bettors and prediction market traders disagree on the likely outcome.
On Kalshi, this market is priced through an order-book mechanism where traders submit bids and asks for shares representing each possible outcome. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each share reflects the collective assessment of probability; higher prices indicate stronger confidence in that result. As new trades execute, prices adjust in real time, allowing the market to incorporate breaking news, player form, or course conditions relevant to the matchup.
This market resolves around Jun 18, 2026, once the first round of the tournament concludes and results are finalized. The outcome is determined by the official tournament scoring and verified against credible public sources. Your position settles based on which player or result occurred during the actual three-ball competition, with no ambiguity in the final determination.
Several factors could shift odds before the tournament begins: recent player performance and world rankings, course conditions and weather forecasts, injury updates or withdrawals, and betting action from professional golf analysts. Media coverage highlighting one player's form or historical success at the venue may also influence trader sentiment. Late-breaking news about the course setup or field adjustments could trigger sharp moves as informed traders react faster than casual participants.