TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 18, 6:44 PM EST
Polymarket
This market refers to the tennis match between Mary Stoiana and Paula Badosa in the Sao Paulo Open, originally scheduled for September 18, 2026 at 9:00AM ET. This market will resolve to 'Mary Stoiana' if Mary Stoiana advances against Paula Badosa. This market will resolve to 'Paula Badosa' if Paula Badosa 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 October 2, 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 Mary Stoiana and Paula Badosa in the Sao Paulo Open, originally scheduled for September 18, 2026 at 9:00AM ET. This market will resolve to 'Mary Stoiana' if Mary Stoiana advances against Paula Badosa. This market will resolve to 'Paula Badosa' if Paula Badosa 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 October 2, 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 wisdom of the crowd, potentially offering a different perspective than traditional sportsbooks. Sportsbooks set their lines based on statistical models and expert analysis, while this market aggregates the beliefs of many individual traders. It's common to see discrepancies between the two, especially before significant events or when new information emerges. These differences can arise from varying levels of information, biases, or simply differing interpretations of the available data. Comparing the two can be a useful exercise for informed decision-making.
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 each player winning the Stoiana-Badosa match. As more traders participate, the price adjusts to reflect the collective assessment. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price movements are driven by supply and demand, with increased buying pressure pushing prices up and increased selling pressure pushing prices down. This dynamic pricing ensures the market remains responsive to new information and changing sentiment.
This market resolves around Sep 25, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official result of the Stoiana-Badosa match as reported by a recognized tennis authority. The winner of the match will determine the winning outcome in this market. Traders should monitor official sources for the final result to understand when the market will be settled. The platform will then distribute payouts to those who correctly predicted the outcome.
Several factors could influence the price of this market before Sep 25, 2026. Any news regarding player injuries, changes in playing conditions, or updated rankings could significantly shift trader sentiment. Unexpected results in preceding matches for either Mary Stoiana or Paula Badosa could also lead to price adjustments. Furthermore, public endorsements, expert analysis, or even significant betting activity in traditional sportsbooks could all serve as catalysts for movement in this market. Monitoring these signals will be crucial for understanding potential shifts in the implied probabilities.