WTA Tennis Matches
Liquidity-weighted aggregate sits at 50% across 4 Kalshi contracts.
Implied probability
Kalshi
50%
4 contracts
Polymarket
—
not bound
Cross-venue gap
—
single venue
24h move
—
no pin
24h volume
$153K
4 contracts
Closes
Jun 15, 2026
11 days
30-day trend
Bracket families
4 clusters across 4 contracts.
These contracts were grouped by title similarity. The headline aggregate combines all clusters; verify the cluster you actually need before quoting a number.
Cluster 1
Will Marta Kostyuk win the Kostyuk vs Andreeva: Semifinal match
Will Marta Kostyuk win the Kostyuk vs Andreeva: Semifinal match?: Marta Kostyuk
KXWTAMATCH-26JUN04KOSAND-KOS
Cluster 2
Will Mirra Andreeva win the Kostyuk vs Andreeva: Semifinal match
Will Mirra Andreeva win the Kostyuk vs Andreeva: Semifinal match?: Mirra Andreeva
KXWTAMATCH-26JUN04KOSAND-AND
Cluster 3
Will Maja Chwalinska win the Shnaider vs Chwalinska: Semifinal match
Will Maja Chwalinska win the Shnaider vs Chwalinska: Semifinal match?: Maja Chwalinska
KXWTAMATCH-26JUN04SHNCHW-CHW
Cluster 4
Will Diana Shnaider win the Shnaider vs Chwalinska: Semifinal match
Will Diana Shnaider win the Shnaider vs Chwalinska: Semifinal match?: Diana Shnaider
KXWTAMATCH-26JUN04SHNCHW-SHN
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These markets stopped trading. Last odds and any captured outcome are shown above — full settlement detail lives at the venue.
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How we compute these odds
SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.
For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.
Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.
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