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Will Flávio Bolsonaro win the 2026 Brazilian presidential election?

36.0%
Consensus Probability (Model B — Geometric Mean of Odds)
3 platforms · 10pp spread · $3.9M

Across 3 prediction market platforms, "Will Flávio Bolsonaro win the 2026 Brazilian presidential election?" has a consensus probability of 36.0%. Gemini: 40.0%, Manifold: 30.2%, Polymarket: 38.2%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Gemini
View →
40%
Manifold
View →
30%
25 traders
Polymarket
View →
38%
$3.9M
Probability Over Time
All 6 Consensus Models
Market Details
Gemini
Updated 46m ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Oct 2026
Manifold
Updated 46m ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Oct 2026
Polymarket
Updated 9h ago
Volume
$3.9M
Liquidity
$152K
Bid / Ask
38.0% / 38.5%
Spread
0.5%
Opened
Apr 2026
Resolves
Oct 2026
A presidential election is scheduled to take place in Brazil on October 4, 2026. This market will resolve according to the listed candidate that wins this election. This market includes any potential second round. If the result of this election isn't known by June 30, 2027, 11:…

About This Consensus

Computed from 3 platforms using geometric mean of odds (Satopaa et al., 2014). This method was validated by the IARPA ACE forecasting tournament as the most accurate probability aggregation technique. Full methodology →

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