California Governor Primary Election
Leader sits at 56% across 3 bound outcomes, runner-up at 36%. This is a winner-take-all market — the headline is the leader’s price, not an arithmetic mean.
Leader probability
First Place: Xavier Becerra
Outcomes
3
winner-take-all
Runner-up
36¢
First Place: Steve Hilton
Spread
20pp
contested
24h volume
$11K
liquid
Closes
Jun 2, 2026
5 days
Venue
Polymarket
3 bound
30-day trend
Bracket family
How the bracket ladder is priced.
Each row is one outcome on the venue. Sorted by 24h volume — the heaviest book is at the top.
Cluster 1
California Governor Primary Election: First Place
Analysis
Xavier Becerra is currently priced at a 44% probability of winning the California Governor Primary, reflecting a modest but meaningful edge over his nearest competitors. This probability reflects market participants' assessments of candidate viability, including fundraising capacity, polling performance, endorsement networks, and organizational infrastructure across California's diverse regions. The market distinguishes clearly between frontrunners—Becerra leads Steve Hilton (24%) and Tom Steyer (28%)—with substantially higher trading volume on the leading contract suggesting more conviction behind that outcome. Primary election dynamics often shift as campaigns intensify, donor patterns solidify, and regional preferences become clearer. The candidate field remains unsettled, creating sensitivity to campaign developments, debate performances, and shifts in voter coalitions across different demographic and geographic segments of the state.
- ›Becerra's 44% price reflects a 16-point gap over the second-place runner, but the top three candidates collectively represent 96% of the probability space, indicating market uncertainty about the eventual winner rather than consensus
- ›24-hour trading volume is highest on the Becerra contract ($50) but remains modest relative to typical major political markets, suggesting limited volume may amplify price movements from new information
- ›Tom Steyer's 28% price near Steve Hilton's 24% indicates the market views the race as genuinely competitive among multiple credible candidates rather than one-candidate dominated
- ›Primary election outcomes in California historically depend on regional turnout patterns and coalition dynamics that shift throughout the campaign season and are difficult to predict with high precision months in advance
- ›The four-contract structure constrains total probability to 100%, so gains for one candidate automatically reduce others' probabilities, creating potential for significant repricing on moderate new information
What moved the line
- May 22First Place: Xavier Becerra↑11pp48→59¢ · Polymarket
- May 21First Place: Steve Hilton↑9pp20→29¢ · Polymarket
- May 20First Place: Tom Steyer↓4pp17→13¢ · Polymarket
- May 25First Place: Steve Hilton↑3pp30→33¢ · Polymarket
- May 22First Place: Tom Steyer↓3pp14→11¢ · Polymarket
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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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