Flávio Bolsonaro holds a commanding position in Rio de Janeiro for the October 25 presidential runoff, driven by consistent polling leads of 8–13 points over Lula in state-specific surveys from Datafolha and others conducted in late September and early October. As the Liberal Party senator representing the state, he benefits from entrenched conservative support in the Southeast, where voters have shown sustained preference for right-wing candidates in recent cycles. First-round results and subsequent national surveys reinforced this pattern, with Flávio advancing ahead of expectations. Trader consensus at 98% reflects these structural and survey-based factors. Shifts could arise from unusually low turnout among his base, significant late endorsements for Lula, or major campaign developments within the final weeks, though current evidence indicates limited scope for reversal.