Brazil 2026 presidential election (1st round, October 4): Flávio Bolsonaro (PL) receives more than 35.0% of valid votes (confirmed by Tribunal Superior Eleitoral or Reuters by October 5, 2026)
Pending
✦ AI-generated prediction
Published on 30. September 2026
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Predicted for 4. October 2026
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Based on: Statistical Pattern
Senator Flávio Bolsonaro (PL) is the leading conservative challenger against 79-year-old incumbent Lula da Silva (PT). Recent polls show Flávio at 33–43%: Datafolha (Sept 22–24): 36%, Quaest/Genial (Sept 24–27): 34%, AtlasIntel/Bloomberg: 43.4%. The three-poll average is ~38%; even the most conservative polls show him at 34–36%. Prediction markets price Flávio as overall election winner: Polymarket ~58–59%, Kalshi ~61% — a clear market consensus on his mobilization advantage heading into the runoff. The >35% threshold sits near the lower end of the polling range, yielding solid probability. A runoff on October 25 is virtually certain as neither candidate polls above 50%.
Data basis for this prediction
- Datafolha 22.–24.09.2026: Lula 40 %, Flávio Bolsonaro 36 % (Al Jazeera, 25.09.2026)
- Quaest/Genial 24.–27.09.2026: Lula 39 %, Flávio 34 %, Stichwahl 41:41 % (Rio Times Online, 28.09.2026)
- AtlasIntel/Bloomberg September 2026: Lula 45,8 %, Flávio 43,4 %
- Polymarket: Flávio Bolsonaro gewinnt Präsidentschaft ~58–59 %; Kalshi: ~61 % (Stand 30.09.2026)
Verdict: Pending
This prediction is still open. It will be evaluated automatically against real-world sources after its due date.
🏛️ Politics
✦ AI
The SNS-led coalition list stands at 48.6% of votes according to Faktor Plus polling from September 21, 2026 (up from 47.2% in early September), with the Student List at ~36–40%. Kalshi prices the SNS plurality at ~43% implied probability, reflecting the market's pricing of uncertainty from the anti-corruption opposition movement. We deviate slightly upward (+12pp): SNS has structural advantages in mobilization infrastructure, state media, and historically dominant results. The snap election was strategically called by Vučić to consolidate power ahead of a presidential transition.
🏛️ Politics
✦ AI
Current polls (Léger, Mainstreet, September 28-29, 2026) show the PQ at 30% vote share — ahead of Liberals (PLQ, 22%), PCQ (17%), and a collapsing CAQ (16%). Projection model 338Canada assigns a 56% probability to a PQ majority; Route127 also projects a PQ majority government. QC125 is more conservative: 32% chance of majority, projecting 63 seats (exactly at the threshold). Elevated advance-poll turnout (+23.59% by September 28) historically favors PQ core voters outside Montréal. No direct Polymarket contract; the model range (32-56%) reflects genuine uncertainty. A midpoint of 55% is set — just above a toss-up. Key risk: strategic voting by ex-CAQ voters for PLQ in suburban ridings around Québec City.
🏛️ Politics
✦ AI
Kalshi sees Labour as slight favorite at 53% vs. National at 48% (as of 29.09.2026). Latest poll (1News/Verian, 28.09.2026): National 28%, Labour 28%, Greens 16% (historic high), ACT 11%, NZ First 9%. Under MMP the left bloc (Labour + Greens + NZ First) totals ~53% and comfortably exceeds the 61-seat majority threshold; the right bloc (National + ACT) reaches only 39% and depends on NZ First. The historically strong Greens result strengthens the left bloc's negotiating position. Main risk: NZ First opts for a coalition with National and ACT.