TOTAL VOLUME:
$154.6b
24H VOL:
$323,326,361
24H TRANSACTIONS:
2,984,640,614
OPEN INTEREST:
$1,969,435,260
419,363
Markets across
40,411
events
MATCHED EVENTS:
4,612
PLATFORM COVERAGE:
5
Polymarket:
37%
VS.
Kalshi:
63%
Closed: Oct 5, 3:07 PM EST
Polymarket
Description
A presidential election is scheduled to take place in Rio de Janeiro, Brazil on October 4, 2026. This market will resolve according to the listed candidate who receives the most valid votes in the first round of this election from Rio de Janeiro. Candidates will be primarily ranked by order of valid votes won in Rio de Janeiro. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the highest finishing position after applying this ranking. If the result of this election isn't known definitively by June 30, 2027, 11:59 PM ET, the market will resolve to "Other". This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., https://dadosabertos.tse.jus.br/).
Polymarket
A presidential election is scheduled to take place in Rio de Janeiro, Brazil on October 4, 2026. This market will resolve according to the listed candidate who receives the most valid votes in the first round of this election from Rio de Janeiro. Candidates will be primarily ranked by order of valid votes won in Rio de Janeiro. If two or more candidates are tied for any position, ties will be broken by alphabetical order of the candidates’ listed full names as they appear in this market. This market will resolve to the candidate that occupies the highest finishing position after applying this ranking. If the result of this election isn't known definitively by June 30, 2027, 11:59 PM ET, the market will resolve to "Other". This market will resolve based on the result of the election, as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., https://dadosabertos.tse.jus.br/).
Frequently asked questions
On Polymarket, the current implied probability reflects trader sentiment about the likely winner in the Rio de Janeiro presidential vote market. Polling averages offer another perspective, aggregating public opinion from surveys conducted across the state. Historically, prediction markets have sometimes shown tighter or more volatile pricing than traditional polls, especially when traders react to new information or shifting campaign dynamics. Comparing this market's odds to recent polling trends can reveal whether investors are more or less optimistic about any candidate's chances than the general electorate.
This market resolves around Oct 5, 2026, with the outcome confirmed once the election results from Rio de Janeiro are verifiable from credible public reporting. The first-place finisher is determined by official vote tallies, and the market settles accordingly, closing all positions based on the verified leader in that state’s first-round voting.
Several key developments could shift this market before Oct 5, 2026. Major polling updates showing a surge or decline for any candidate will likely cause rapid price adjustments. Debate performances, economic announcements, or controversies directly involving the leading contenders often create short-term volatility. As the election approaches, trading activity may intensify, especially following televised debates or significant campaign events that capture widespread public attention.
