TOTAL VOLUME:

$134b

24H VOL:

$107,351,958

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,416,970,024

400,720

Markets across

30,097

events

MATCHED EVENTS:

2,633

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Marta Kostyuk vs Sloane Stephens: Total Games
kalshi

Marta Kostyuk vs Sloane Stephens: Total Games

Volume:
$23,230

Over 15.5 games

 - Kalshi

Over 15.5 games - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 2, 2026

Closed: Sep 2, 3:13 PM EST

kalshi

Kalshi

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Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Over 15.5 games

View
100%
Yes 100¢No 0¢
100¢
N/A
$3,823
N/A
N/A
$3,272
Settled
Yes
kalshi

Over 20.5 games

0%
Yes 0¢No 100¢
100¢
N/A
$17,500
N/A
N/A
$11,232
Settled
No
kalshi

Over 25.5 games

0%
Yes 0¢No 100¢
100¢
N/A
$1,908
N/A
N/A
$1,675
Settled
No
Total markets: 3

Description

Marta Kostyuk and Sloane Stephens compete in the 2026 US Open Women Singles Round Of 64, and spectators wager on whether their match will surpass set game totals.

Kalshi

Resolution depends on whether the Marta Kostyuk vs Sloane Stephens match completes more than 15.5, 20.5, or 25.5 games. Cancellations before any play result in fair pricing. Postponed matches remain active for up to two weeks after rescheduling. If a player retires, settled markets resolve based on completed games; others resolve to Fair Market Price at the Exchange's discretion.