Press note
Brazil Election Polls vs Polymarket Odds: What the Numbers Mean
77¢Flávio Bolsonaro, Polymarket Yes offer
Market page checked 19 October 2026. Lula 24¢
A 51% vote share and a 77¢ election contract answer different questions. A dated Brazil example explains polls, probabilities, spreads and uncertainty. A candidate can lead a close poll while trading at a much higher winner-market price. The poll's percentage is an estimate of voting intention. The market's percentage is a price interpreted as a chance of satisfying that contract's winning condition. A difference between them does not, on its own, show a pricing mistake. The Polymarket election page, checked on 19 October 2026, displayed a 77¢ Yes offer for Flávio Bolsonaro and a 24¢ Yes offer for Lula. The dated poll below measures something else, and was conducted several days earlier. This is a comparison of definitions and observation times, not a calibrated forecast.
Observed 2026-08-01 to 2026-10-19, population: Yes prices of Flávio Bolsonaro and Luiz Inácio Lula da Silva.
Supporting figures
- 51% — Flávio Bolsonaro, Datafolha valid votesFieldwork 13 and 14 October, 2,520 interviews, margin of error 2 points. Lula 49%
- +21.2 pts — Climb as the first-round count came in64.3¢ at 20:22 UTC to 85.45¢ at 20:59 UTC on 4 October, 37 minutes
- −10.2 pts — Fall on 15 October86.2¢ at 00:00 UTC on 14 October to 76¢ at its lowest on 15 October
Images
Share card, 1200×630 — the headline figure and the title, rendered. Credit Vultax Research.
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Links
- The study
- Full text, sources and method
- Markdown edition
- Plain text for quoting and for assistants
- Chart figures (CSV)
- The numbers behind the headline chart
- All datasets (JSON)
- Every published table and chart, with units and sources
- Open the Brazil election odds room
- Follow market prices, available depth and recorded activity alongside the official election sources.
Press contact
Vultax Research — [email protected]
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How to cite
Vultax Research, Brazil Election Polls vs Polymarket Odds: What the Numbers Mean, 2026-10-20, https://vultax.com/research/brazil-election-2026-polls-vs-prediction-markets
Published 2026-10-19, last revised 2026-10-20. Figures are the published study; live screens move. Plain-text version, Use our data