Will Partido dos Trabalhadores (PT) win the most seats in the next Brazilian Senate election?

Q: Will Partido dos Trabalhadores (PT) win the most seats in the next Brazilian Senate election?

Prediction markets currently price this at 1%. A YES share costs 0.9¢ and pays $1 if it happens. That is a return of 11011.1% over 1.8mo.

Next Brazil Senate Election: Most Seats Won$13k liquidity$3k volumecloses 1.8mo

ElectionsGlobal ElectionsWorldBrazilPoliticsInternational Election Props

Trade on Polymarket

BUY YES

Cost: 0.9¢
Implied chance: 0.9%
Return if right: 11011.1%
Spread cost: 39%

If you put in $100

You get 11111.1 shares at 0.9¢ each.

YES wins: $11111.11 back, a profit of $11011.11. YES loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $7070.71 of that profit. Without it you would make $18081.82.

Assumes the whole order fills at this price. A large order eats into the book and averages worse.

Buy YES on Polymarket

BUY NO

Cost: 99.8¢
Implied chance: 99.8%
Return if right: 0.2%
Spread cost: 64%

If you put in $100

You get 100.2 shares at 99.8¢ each.

NO wins: $100.20 back, a profit of $0.20. NO loses: $0.00, and the whole $100 is gone.

The gap between buyers and sellers takes $0.35 of that profit. Without it you would make $0.55.

Assumes the whole order fills at this price. A large order eats into the book and averages worse.

Buy NO on Polymarket

Chance over time

1H 6H 1D 1W 1M ALL

PT0.5%

Latest: Aug 10, 10:10 PM9 outcomes stayed under 3% and are not plotted

Latest news

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How this market resolves

The next federal Senate election is scheduled to take place in Brazil on October 4, 2026, in which two-thirds of the Senate’s 81 seats will be contested. This market will resolve according to the political party that wins the greatest number of seats in the next Brazilian Senate election. Only seats contested in the next Brazilian Senate election will be considered. 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., www.tse.jus.br/eleicoes/resultados-eleicoes).