What is the current probability for "Marta Kostyuk vs Sloane Stephens: Set 1 Winner"?

Current Kalshi odds for "Marta Kostyuk vs Sloane Stephens: Set 1 Winner": Marta Kostyuk 99%, Sloane Stephens 1% (top 2 of 2 outcomes), refreshed continuously.

When does this market resolve?

This event resolves on 9/1/2026.

How is the probability calculated?

pdata reads the latest market prices directly from kalshi's public API and normalizes them to a 0-100 probability scale. See https://pdata.world/methodology for details on per-platform conventions.

Where can I get this data programmatically?

The JSON endpoint is https://api.pdata.world/api/v1/events/kalshi/KXWTASETWINNER-26AUG18KOSSTE-1. An MCP server with 9 tools is available at https://api.pdata.world/mcp. Full agent guide: https://pdata.world/agents.md.

closedtrade on Kalshi

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event2 outcomes

Marta Kostyuk vs Sloane Stephens: Set 1 Winner

·Sports·ends Sep 1, 2026

vol cum

$197.7k

vol 24h

$197.7k

outcomes

ends

Sep 1, 2026

outcomesclick to inspect →

marketselected outcome

Marta Kostyuk

rank #1 · resolved: yes

99¢

▲ 99.0pp

24h change

vol cum

$129.9k

vol 24h

$129.9k

spread

1.00

ends

Sep 1, 2026

If Marta Kostyuk wins set 1 in the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 WTA Cincinnati Round Of 32, then the market resolves to Yes.

timeline

opened · Aug 17, 2026closedresolved · Aug 18, 2026

Marta Kostyuk · prices over time

−24h

now

volume · by outcomehover a column to inspect

no volume history

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