Brazil Presidential Election

Brazil's 2026 presidential election is scheduled for October 4, with a potential runoff on October 25. Incumbent President Luiz Inácio Lula da Silva is running for an unprecedented fourth term at age 80. His predecessor Jair Bolsonaro is ineligible to run after being indicted and imprisoned for plotting a coup, but the Bolsonaro name remains on the ballot through his son, Senator Flávio Bolsonaro, who carries the family's far-right Liberal Party (PL) banner. The prediction markets reflect an exceptionally tight race. Lula and Flávio Bolsonaro are both priced at a 50.5% consensus, making this effectively a coin-flip contest. Flávio is the cheapest to back on Polymarket at 49.4%, while Lula's best entry is 49.0% on Kalshi. The one notable outlier is Polymarket US, which prices Lula at 55.0% — a roughly 5-point premium over the other platforms. Recent polling explains the knife-edge positioning: a PoderData/Aya survey published September 10 shows Flávio at 47% versus Lula at 45% in a runoff simulation, with Lula leading the first round at 38% to Flávio's 36%. In mid-August, Lula led that same runoff simulation 46–45, before Flávio edged ahead for the first time on September 3. AtlasIntel/Bloomberg and other surveys indicate Flávio has closed a multi-point gap since late August, partly as a Supreme Court dispute involving Justice Alexandre de Moraes has weighed on Lula's reelection bid. All other candidates — including Renan Santos at ~3.5% and Fernando Haddad at ~1.5% — are distant long shots. Across platforms, the consensus is striking in its uniformity: despite over $153 million in total volume, no platform gives either frontrunner more than a few percentage points of separation, making this one of the tightest major election markets currently live.