🏛️ Politics · Next Month

Brazilian presidential election (October 4, 2026): Flávio Bolsonaro (PL) wins more than 35.0% of votes in the first round

Hit ✦ AI-generated prediction Published on 22. September 2026 · Predicted for 4. October 2026 · Based on: Statistical Pattern

Probability

63%

Datafolha (September 15–17, 2026) shows Flávio Bolsonaro at 36% in round one — one point above the threshold. AtlasIntel (Sept. 2026) shows him significantly higher at 41.7%. Most aggregates fall between 36% and 42%. Historically, the Bolsonaro bloc displayed a 'shy voter' effect: Jair Bolsonaro outperformed his polls by ~2pp in 2022. AtlasIntel has Flávio actually leading the runoff 47.2% vs. Lula's 46.8%. Falling below 35% would represent a substantial polling miss. No direct Polymarket market found for Bolsonaro's exact vote share; own estimate 63%.

Data basis for this prediction

Datafolha: Lula 39%, Flávio Bolsonaro 36% erster Wahlgang (15.–17. Sept. 2026, via Al Jazeera/U.S. News)
AtlasIntel: Flávio Bolsonaro 41,7% (1. WG), Stichwahl 47,2% vs. Lula 46,8% (Sept. 2026)
AS/COA: Brasilien-Rennen als 'deadlock within margin of error' (Sept. 2026)
TSE 2022: Bolsonaro übertraf finale Umfragen um ~2 Prozentpunkte (Tribunal Superior Eleitoral)

Verdict: Hit

Flávio Bolsonaro erzielte im ersten Wahlgang der brasilianischen Präsidentschaftswahl am 4. Oktober 2026 ca. 47,03 % der abgegebenen Stimmen – deutlich mehr als die vorhergesagte Schwelle von 35,0 %. Lula erhielt ca. 45,16 %. Beide kamen in die Stichwahl am 25. Oktober 2026. Das tatsächliche Ergebnis lag sogar über den optimistischsten Umfragewerten (AtlasIntel: 41,7 %). Quellen: CNN (brazil-president-elections-2026), CNBC (brazil-presidential-election-lula-bolsonaro), Americas Quarterly (flavio-bolsonaro-and-lula-advance-to-brazils-presidential-runoff).

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