Will Republicanos (REPUBLICANOS) hold the most seats as a result of the next Brazilian Senate election?

The 7¢ price reflects an extremely bearish outlook on Republicanos winning the most Senate seats, yet the asymmetric 2459% implied yield on YES positions suggests either severe mispricing or minimal conviction given the $0 24-hour volume and wide 13¢ spread. The 1931% realized volatility and 4.32 vol ratio indicate this market has experienced dramatic price swings despite low liquidity ($646K open interest), raising questions about whether the current price represents genuine probability assessment or illiquidity-driven distortion with 171 days until resolution.

Resolution rules

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 holds the greatest number of seats in the next Brazilian Senate as a result of the next Brazilian Senate election. All seats, not only the ones contested in the next Brazilian Senate election, will be considered. In the event of a tie between multiple parties for the most seats held, this market will resolve in favor of the party whose listed abbreviation appears first in alphabetical order. This market's resolution will be based solely on the number of seats held by the named party in the Brazilian Senate as a result of the next Brazilian Senate election, not by any federation or coalition it may be a part of. 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) or the Brazilian Senate (https://www25.senado.leg.br/web/senadores/em-exercicio/-/e/por-partido).

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