Brazil Chamber of Deputies Election Winner: Odds & Probability

The probability implied by the market for Partido Liberal (PL) leading the Chamber of Deputies sits at 60.5%. Over the observed period it has ranged from 48.5% to 71.5%. The market resolves according to which political party or electoral federation wins the highest number of seats in the next Chamber of Deputies election, scheduled for October 4, 2026. Ties are broken alphabetically by the entity’s listed abbreviation. Only the named party or federation’s own seats count—coalition partners do not add to its total. If no definitive result is known by June 30, 2027, 11:59 PM ET, the contract settles as “Other.” Resolution follows a consensus of credible reporting, defaulting to official tallies from the Superior Electoral Court (TSE) or the Brazilian Chamber of Deputies. The probability can shift as the October 2026 election nears and passes, with the June 2027 deadline acting as a backstop. Any official seat counts from the TSE or the Chamber of Deputies are the ultimate factual inputs.