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icon for Piauí Senate Election: 1st Place
Elections·Main Election

Piauí Senate Election: 1st Place

icon for Piauí Senate Election: 1st Place
Elections·Main Election

Piauí Senate Election: 1st Place

Marcelo Castro 54%

Ciro Nogueira 31%

Julio Cesar 16.0%

Alexandre Mariano <1%

Polymarket

$39,611 Vol.

Marcelo Castro 54%

Ciro Nogueira 31%

Julio Cesar 16.0%

Alexandre Mariano <1%

Polymarket

$39,611 Vol.

icon for Marcelo Castro

Marcelo Castro

$10,228 Vol.

54%

icon for Ciro Nogueira

Ciro Nogueira

$11,255 Vol.

31%

icon for Julio Cesar

Julio Cesar

$2,468 Vol.

11%

icon for Alexandre Mariano

Alexandre Mariano

$999 Vol.

<1%

icon for Antônio Barros

Antônio Barros

$917 Vol.

<1%

icon for Antônio José Lira

Antônio José Lira

$954 Vol.

<1%

icon for Cloves José

Cloves José

$860 Vol.

<1%

icon for Danniel Rocha

Danniel Rocha

$840 Vol.

<1%

icon for Dionisio Carvalho

Dionisio Carvalho

$879 Vol.

<1%

icon for Francinaldo Leão

Francinaldo Leão

$971 Vol.

<1%

icon for Jardenya Bezerra

Jardenya Bezerra

$840 Vol.

<1%

icon for Jorge Lopes

Jorge Lopes

$840 Vol.

<1%

icon for Maria Madalena Nunes

Maria Madalena Nunes

$945 Vol.

<1%

icon for Missionário Evandro Craveiro

Missionário Evandro Craveiro

$1,105 Vol.

<1%

icon for Pastor Sena

Pastor Sena

$810 Vol.

<1%

icon for Pedro Laurentino

Pedro Laurentino

$982 Vol.

<1%

icon for Tiago Junqueira

Tiago Junqueira

$765 Vol.

<1%

icon for Toinho Dufrango

Toinho Dufrango

$1,060 Vol.

<1%

icon for Major Paulo Roberto

Major Paulo Roberto

$958 Vol.

<1%

icon for Irmão Evandro Marques

Irmão Evandro Marques

$935 Vol.

<1%

The Brazilian Federal Senate election for Piauí is scheduled to take place on October 4, 2026. This market will resolve according to the candidate who wins the most valid votes of any candidate at the specified election. Candidates will be primarily ranked by order of valid votes won. 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 definitively known 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., www.tse.jus.br/eleicoes/resultados-eleicoes).Marcelo Castro (MDB) holds a narrow edge in trader pricing for first place in Piauí’s two-seat Senate race, reflecting recent polls that place him slightly ahead or tied with Ciro Nogueira (PP) and Júlio César (PSD) among the three frontrunners. Multiple June and July surveys showed the trio clustered within a few points in consolidated first- and second-vote scenarios, with Castro often at 20-30% and the others close behind amid 15-60% undecided or blank responses. Castro benefits from lower rejection and alignment with the state’s governing base, while Nogueira’s higher negative ratings and national profile create a ceiling, and Júlio César gains from first-time Senate momentum. The October 2 vote and persistent undecided share keep separation unlikely without major late shifts in alliances or turnout.

The Brazilian Federal Senate election for Piauí is scheduled to take place on October 4, 2026.

This market will resolve according to the candidate who wins the most valid votes of any candidate at the specified election.

Candidates will be primarily ranked by order of valid votes won. 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 definitively known 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., www.tse.jus.br/eleicoes/resultados-eleicoes).The Brazilian Federal Senate election for Piauí is scheduled to take place on October 4, 2026. This market will resolve according to the candidate who wins the most valid votes of any candidate at the specified election. Candidates will be primarily ranked by order of valid votes won. 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 definitively known 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., www.tse.jus.br/eleicoes/resultados-eleicoes).
Volume
$39,611
End Date
Oct 4, 2026
Market Opened
Aug 17, 2026, 6:05 AM ET

Resolver

0x69c47De9D...
The Brazilian Federal Senate election for Piauí is scheduled to take place on October 4, 2026. This market will resolve according to the candidate who wins the most valid votes of any candidate at the specified election. Candidates will be primarily ranked by order of valid votes won. 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 definitively known 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., www.tse.jus.br/eleicoes/resultados-eleicoes).Marcelo Castro (MDB) holds a narrow edge in trader pricing for first place in Piauí’s two-seat Senate race, reflecting recent polls that place him slightly ahead or tied with Ciro Nogueira (PP) and Júlio César (PSD) among the three frontrunners. Multiple June and July surveys showed the trio clustered within a few points in consolidated first- and second-vote scenarios, with Castro often at 20-30% and the others close behind amid 15-60% undecided or blank responses. Castro benefits from lower rejection and alignment with the state’s governing base, while Nogueira’s higher negative ratings and national profile create a ceiling, and Júlio César gains from first-time Senate momentum. The October 2 vote and persistent undecided share keep separation unlikely without major late shifts in alliances or turnout.

The Brazilian Federal Senate election for Piauí is scheduled to take place on October 4, 2026.

This market will resolve according to the candidate who wins the most valid votes of any candidate at the specified election.

Candidates will be primarily ranked by order of valid votes won. 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 definitively known 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., www.tse.jus.br/eleicoes/resultados-eleicoes).The Brazilian Federal Senate election for Piauí is scheduled to take place on October 4, 2026. This market will resolve according to the candidate who wins the most valid votes of any candidate at the specified election. Candidates will be primarily ranked by order of valid votes won. 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 definitively known 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., www.tse.jus.br/eleicoes/resultados-eleicoes).
Volume
$39,611
End Date
Oct 4, 2026
Market Opened
Aug 17, 2026, 6:05 AM ET

Resolver

0x69c47De9D...

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Frequently Asked Questions

"Piauí Senate Election: 1st Place" is a prediction market on Polymarket with 20 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Marcelo Castro" at 54%, followed by "Ciro Nogueira" at 31%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 54¢ implies that the market collectively assigns a 54% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "Piauí Senate Election: 1st Place" has generated $39.6K in total trading volume since the market launched on Aug 17, 2026. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "Piauí Senate Election: 1st Place," browse the 20 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Piauí Senate Election: 1st Place" is "Marcelo Castro" at 54%, meaning the market assigns a 54% chance to that outcome. The next closest outcome is "Ciro Nogueira" at 31%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Piauí Senate Election: 1st Place" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.