TOTAL VOLUME:
$154.6b
24H VOL:
$323,326,361
24H TRANSACTIONS:
2,984,640,614
OPEN INTEREST:
$1,969,435,260
419,363
Markets across
40,411
events
MATCHED EVENTS:
4,612
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 20, 1:40 AM EST
Polymarket
This market refers to the tennis match between Katie Boulter and Himeno Sakatsume in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to 'Katie Boulter' if Katie Boulter advances against Himeno Sakatsume. This market will resolve to 'Himeno Sakatsume' if Himeno Sakatsume advances against Katie Boulter. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.
This market refers to the tennis match between Katie Boulter and Himeno Sakatsume in the Japan Women's Open, originally scheduled for October 18, 2026 at 9:00PM ET. This market will resolve to 'Katie Boulter' if Katie Boulter advances against Himeno Sakatsume. This market will resolve to 'Himeno Sakatsume' if Himeno Sakatsume advances against Katie Boulter. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 1, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.
Prediction market odds often reflect the collective wisdom of a diverse group of traders, which can differ from sportsbook odds set by professional oddsmakers. Sportsbooks may incorporate factors like public betting percentages and risk management into their lines, while this market is driven purely by individuals’ beliefs about the outcome. Discrepancies can arise due to differing information, analytical approaches, or simply the influence of biases. Comparing the two can reveal potential value or opportunities for arbitrage, though it’s important to consider the volume traded in this market as an indicator of confidence.
On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the outcome. The price of a share directly reflects the implied probability of that outcome occurring. As more people buy shares in a particular outcome, its price increases, and vice versa. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price adjusts dynamically based on supply and demand, creating a real-time assessment of the potential winner of the Boulter vs Sakatsume match. This differs from fixed-odds betting, as the odds aren't set beforehand.
This market resolves around Oct 26, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official result of the Boulter vs Sakatsume match as reported by a recognized tennis authority. The platform will verify the result against these sources to determine which outcome corresponds to the actual winner. Traders will then be able to claim their winnings based on the final result and their holdings in the market.
Several factors could influence trading activity in this market. Any news regarding player form, injuries, or changes in playing conditions could significantly shift the odds. For example, reports of a minor injury to Katie Boulter or Himeno Sakatsume would likely impact the market. Unexpected results in other matches leading up to this one could also influence traders’ perceptions. Furthermore, any significant shifts in public opinion or expert analysis could also drive price movements in this market as traders adjust their positions.