GoKawiilPolymarket badly misjudged Brazil's Lula-Bolsonaro runoff
Polymarket odds gave Flávio Bolsonaro roughly an 80 percent chance of winning Brazil's presidential runoff, with that figure holding as high as 81 percent on election day itself. Lula da Silva instead won the vote 51.8 percent to 48.2 percent, prompting Bolsonaro's odds to collapse to as low as 15 percent once results began emerging. More than $62 million had been wagered on Bolsonaro winning.
GoKawiil's interpretation of the reporting above, not reported fact.
The mismatch raises questions about whether crowd-based betting markets genuinely capture election dynamics or simply reflect concentrated wagers that can diverge sharply from actual voter sentiment, as traditional on-the-ground polling reportedly showed a much tighter race. A single wrong call doesn't disprove the model, but it could undercut the growing use of platforms like Polymarket as go-to forecasting tools for major political events.
- Polymarket gave Bolsonaro around 80 percent odds of winning right up to election day.
- Lula won the runoff 51.8% to 48.2%, a result the market badly failed to anticipate.
- Over $62 million was bet on Bolsonaro, whose odds crashed to about 15 percent once results emerged.
Source: futurism.com — Frank Landymore, 2026-10-26
Published there as: ““Prediction” Markets Were Comically Wrong About the Brazilian Election”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.