TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Aug 30, 4:13 PM EST
Polymarket
This market refers to the tennis match between Marta Kostyuk and Storm Hunter in the US Open WTA, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Storm Hunter. This market will resolve to 'Storm Hunter' if Storm Hunter advances against Marta Kostyuk. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 13, 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 Marta Kostyuk and Storm Hunter in the US Open WTA, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Storm Hunter. This market will resolve to 'Storm Hunter' if Storm Hunter advances against Marta Kostyuk. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 13, 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 on Polymarket reflect the collective wisdom of traders investing real money, often showing sharper or more nuanced lines than traditional sportsbook odds. For this market, the probability implied by Polymarket pricing can diverge from sportsbook favorites due to insider trading dynamics, recent form analysis, and prop-bet speculation unique to the exchange. Traders should compare both to identify potential value gaps.
On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Polymarket, traders set the odds through buying and selling shares of each possible outcome. The current price reflects the collective assessment of all participants, with the top outcome displayed as a percentage chance. Volume of $115,823 and recent 24-hour volume of $114,480 show how actively this market is being traded, influencing price stability and liquidity for bettors.
This market resolves around Sep 6, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result is determined by the official match conclusion at the US Open, and the platform will update the market accordingly based on that definitive result.
Key signals that could shift this market include player injuries, recent form, head-to-head performance leading up to the match, weather conditions on match day, and any last-minute changes in seeding or scheduling. As the tournament unfolds, updates from practice sessions or media interviews may also influence trader sentiment and drive price movements.