50% — WTA Tennis Matches
Kalshi 50% · 4 contracts · $153K volume · medium confidence
Updated 2026-06-08 04:07:34 UTC

Contracts:
- Will Marta Kostyuk win the Kostyuk vs Andreeva: Semifinal match?: Marta Kostyuk — 55¢ Kalshi $86K (weight 57%)
- Will Mirra Andreeva win the Kostyuk vs Andreeva: Semifinal match?: Mirra Andreeva — 45¢ Kalshi $23K (weight 15%)
- Will Maja Chwalinska win the Shnaider vs Chwalinska: Semifinal match?: Maja Chwalinska — 37¢ Kalshi $23K (weight 15%)
- Will Diana Shnaider win the Shnaider vs Chwalinska: Semifinal match?: Diana Shnaider — 63¢ Kalshi $20K (weight 13%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-06-04T19:20:13.057Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "50% per prediction markets (SimpleFunctions, June 2026)"
Canonical: https://simplefunctions.dev/answer/wta-tennis
Full data: https://simplefunctions.dev/api/public/query?q=WTA%20Tennis%20Matches
Provider: SimpleFunctions — https://simplefunctions.dev