89% — Who will win the governorship in California
Leader: Xavier Becerra at 89% · Kalshi 89% · 2 contracts · $141K volume · medium confidence
Updated 2026-06-11 13:38:50 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 2 outcomes.

Why this matters:
Tom Steyer is currently priced at 40% to win California's governorship, reflecting his standing as the frontrunner among six main candidates in what appears to be a competitive race. The probability suggests meaningful uncertainty, with the second-place candidate at 37%, indicating a closely contested election. This price level would move based on polling trends, campaign funding, endorsement shifts, and primary election results. The primary election date and subsequent performance will be the critical catalyst that reshapes market perceptions, as it will provide concrete data on voter preferences and candidate viability. Between now and that date, candidate spending, debate performances, and demographic-focused campaigning could all materially affect market assessments of each candidate's pathway to victory.

Key factors:
- Tom Steyer leads with 40% implied probability while runner-up trails by only 3 percentage points, indicating a tight race without a dominant frontrunner
- Steve Hilton trades at 9%, Katie Porter at 4%, and Chad Bianco at 4%, showing meaningful tail-risk probability distributed across challengers
- Trading volume on California governorship contracts totals approximately $60,000 in 24-hour volume, suggesting moderate liquidity but room for price discovery as the election approaches
- Primary election results will provide the first major empirical test of candidate viability and voter preferences, acting as the primary uncertainty-resolving event
- Campaign funding, endorsements, and polling shifts between now and the election will incrementally adjust market probabilities as new information emerges

Contracts:
- Who will win the governorship in California?: Xavier Becerra — 89¢ Kalshi $46K (weight 33%)
- Who will win the governorship in California?: Steve Hilton — 10¢ Kalshi $95K (weight 67%)

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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: 2026-06-11T13:20:47.371Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "89% per prediction markets (SimpleFunctions, June 2026)"
Canonical: https://simplefunctions.dev/answer/govca
Full data: https://simplefunctions.dev/api/public/query?q=Who%20will%20win%20the%20governorship%20in%20California
Provider: SimpleFunctions — https://simplefunctions.dev