**Recent polling aggregates place incumbent President Luiz Inácio Lula da Silva and Senator Flávio Bolsonaro in a tight first-round contest ahead of the October 4 vote, with Lula typically at 39–45% and Bolsonaro at 36–43%.** Multiple September surveys from Datafolha, AtlasIntel, Quaest, and others show the pair in statistical ties or narrow margins in simulated runoffs, reflecting high rejection rates near 50% for both and entrenched polarization. Minor candidates including Augusto Cury, Renan Santos, and Ronaldo Caiado remain in low single digits with limited momentum. Jair Bolsonaro’s ineligibility due to prior convictions further channels right-wing support toward his son. These dynamics, combined with Brazil’s two-round system requiring over 50% for an outright win, underpin trader consensus that Lula and Flávio Bolsonaro will advance to the October 25 runoff absent major late shifts.