Cincinnati Open: Marta Kostyuk vs Sloane Stephens

Ends Aug 25, 2026 · Volume: $191K · 24h: $187K · Updated Aug 18, 2026 at 21:15 UTC
PredScope Signal: Strong Consensus

The market strongly favors Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 1 Winner at 100%. High confidence — but lower potential returns.

🔥 Surging 24h volume is 98% of total — extremely active trading
# Outcome Probability If Right Volume
1 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 1 Winner 100% - $2K
2 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 1 O/U 8.5 100% - $23
3 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 1 O/U 9.5 100% - -
4 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 1 O/U 10.5 100% - -
5 Cincinnati Open: Marta Kostyuk vs Sloane Stephens BEST VALUE 100% +0% $186K
6 Completed Match 100% +0% -
7 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 2 Winner 100% +0% $541
8 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 2 O/U 8.5 100% +0% $5
9 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Match O/U 21.5 100% +0% $97
10 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set Handicap +/-1.5 100% +0% $1K
11 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 2 O/U 9.5 100% +0% -
12 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Match O/U 22.5 100% +0% $7
13 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 2 O/U 10.5 100% +0% -
14 Cincinnati Open: Marta Kostyuk vs Sloane Stephens Match O/U 23.5 100% +0% -
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Real-money prediction market · Trade with confidence

This market refers to the tennis match between Marta Kostyuk and Sloane Stephens in the Cincinnati Open, originally scheduled for August 18, 2026 at 10:00AM ET. This market will resolve to 'Marta Kos...

Market Analysis

This prediction market tracks whether Cincinnati Open: Marta Kostyuk vs Sloane Stephens will occur, with $191K in total trading volume reflecting significant trader interest. Prediction markets aggregate the collective intelligence of participants who stake real money on outcomes, making them one of the most reliable forecasting tools available for events driven by team performance data, historical matchups, and real-time injury reports.

The market shows strong consensus: Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 1 Winner is priced at 100%, indicating traders overwhelmingly expect this outcome. At this probability level, the potential return on a correct bet is relatively low, but contrarian positions carry significant upside if the consensus proves wrong.

Trading activity is exceptionally high, with $187K traded in the last 24 hours alone (98% of total volume). This surge often indicates breaking news, a key deadline approaching, or a significant shift in market sentiment.

This market is scheduled to resolve by 2026-08-25. As the resolution date approaches, expect increased trading activity and tighter probability estimates. Historical data shows that prediction market accuracy improves significantly in the final days before resolution.

Total Volume
$191K
Liquidity
$396K

FAQ

What are the current odds for Cincinnati Open: Marta Kostyuk vs Sloane Stephens?

As of Aug 18, 2026 at 21:15 UTC, the leading outcome is Cincinnati Open: Marta Kostyuk vs Sloane Stephens Set 1 Winner at 100% probability, with $191K in total trading volume on Polymarket.

How much money is bet on Cincinnati Open: Marta Kostyuk vs Sloane Stephens?

The total trading volume for this market is $191K, with $187K traded in the last 24 hours. This represents real money at stake from prediction market traders on Polymarket.

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