TOTAL VOLUME:
$154.4b
24H VOL:
$290,393,159
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2,984,640,614
OPEN INTEREST:
$1,944,100,805
420,493
Markets across
40,511
events
MATCHED EVENTS:
4,612
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 22, 2:55 AM EST
Polymarket
This market tracks whether Mary Stoiana will advance against Moyuka Uchijima in their Japan Women's Open tennis match. Currently, Polymarket gives a 100.0% probability to the outcome of “Japan Women's Open: Completed Match: Mary Stoiana vs Moyuka Uchijima”. The resolution source for this market is the official WTA Tennis scores website at https://www.wtatennis.com/scores. Keep an eye on the originally scheduled match time of October 21, 2026 at 9:00PM ET, as this is when the initial signal for match completion will be available.
This market refers to the tennis match between Mary Stoiana and Moyuka Uchijima in the Japan Women's Open, originally scheduled for October 21, 2026 at 9:00PM ET. This market will resolve to 'Mary Stoiana' if Mary Stoiana advances against Moyuka Uchijima. This market will resolve to 'Moyuka Uchijima' if Moyuka Uchijima advances against Mary Stoiana. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 4, 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.
Typically, prediction market odds reflect the wisdom of the crowd and can differ from traditional sportsbook odds. Sportsbooks set lines based on their own models and often incorporate a profit margin, while this market is driven by traders directly expressing their beliefs. If a significant discrepancy exists between prediction market probabilities and sportsbook odds, it may indicate that the market perceives information differently or that there's an opportunity for arbitrage. It's common to see the two converge as the event approaches and more information becomes available.
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 these shares directly reflects the implied probability of that outcome occurring. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate and new information emerges, the prices adjust to reflect the collective assessment. The market's price isn't determined by a central authority but emerges from the interactions of all participants, making it a dynamic and responsive indicator of expectations for the Japan Women's Open match.
This market resolves around Oct 29, 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 Japan Women's Open match between Mary Stoiana and Moyuka Uchijima, as declared by the tournament organizers. The market will determine which player is officially recorded as the winner of the match, and that result will be used to settle all outstanding shares. Traders should monitor official sources for the final result to understand how this market will be settled.
Several factors could influence the price of this market before Oct 29, 2026. Any news regarding player form, injuries, or changes in playing conditions could significantly shift trader sentiment. Unexpected announcements about either Mary Stoiana or Moyuka Uchijima’s preparation, or even weather forecasts impacting the match, could all lead to price adjustments. Publicly available analysis from tennis experts and any shifts in betting odds from sportsbooks might also influence trading activity and, therefore, the market's price.