88% — Which candidates will advance to Brazil's presidential runoff
Leader: Flavio Bolsonaro at 88% · Polymarket 88% · 6 contracts · $66 volume · medium confidence
Updated 2026-05-09 05:11:31 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 6 outcomes.

Why this matters:
The 87% probability indicates that markets expect Flávio Bolsonaro to advance to Brazil's presidential runoff, based on aggregated contracts across Polymarket and Kalshi. The probability reflects confidence that Bolsonaro will finish among the top two candidates in the first round, though separate contracts show lower odds (44%) that he wins outright. The high probability is primarily driven by Bolsonaro's current polling position and name recognition as a leading right-wing candidate, while uncertainty centers on whether challengers like Lula can consolidate opposition votes. The main catalyst for resolution is Brazil's first-round election results, scheduled for their next national election cycle. Between now and that vote, changes in polling aggregates, campaign developments, and voter mobilization efforts—particularly among opposition parties—could shift market expectations either upward or downward.

Key factors:
- Flávio Bolsonaro's position in current public polling relative to second-place finishers determines runoff advancement likelihood
- First-round vote threshold: candidates need sufficient support to place top-two; a fragmented field increases advancement odds, consolidation reduces them
- Lula's ballot eligibility and campaign viability affect whether opposition votes concentrate behind a single competitor
- Turnout levels and regional voting patterns in Brazil's first round directly determine whether leading candidates clear the runoff threshold
- Campaign incidents, legal challenges, or coalition shifts in the 6-12 months before election day could alter candidate viability assessments

Contracts:
- Which candidates will advance to Brazil's presidential runoff?: Flavio Bolsonaro — 88¢ Polymarket $47 (weight 70%)
- Which candidates will advance to Brazil's presidential runoff?: Luiz Inácio Lula da Silva — 82¢ Polymarket $5 (weight 7%)
- Which candidates will advance to Brazil's presidential runoff?: Fernando Haddad — 8¢ Polymarket $0 (weight 0%)
- Which candidates will advance to Brazil's presidential runoff?: Jair Bolsonaro — 4¢ Polymarket $15 (weight 23%)
- Which candidates will advance to Brazil's presidential runoff?: Tarcisio de Frietas — 3¢ Polymarket $0 (weight 0%)
- Which candidates will advance to Brazil's presidential runoff?: Michelle Bolsonaro — 3¢ Polymarket $0 (weight 0%)

Cite as: "88% per prediction markets (SimpleFunctions, May 2026)"
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