**Flávio Bolsonaro leads market pricing for second place in Brazil’s October 4 first-round presidential vote because recent polling from Datafolha, Quaest, AtlasIntel, and Real Time Big Data consistently places him in that position behind incumbent Luiz Inácio Lula da Silva.** Lula holds first-round intentions of roughly 39–43 percent while Flávio registers 34–39 percent, leaving the remaining field—Renan Santos, Augusto Cury, Ronaldo Caiado, and others—well below 6 percent each. The Liberal Party senator has consolidated right-wing support as the designated successor to his father, former president Jair Bolsonaro, amid a polarized contest focused on security, economic policy, and institutional issues. Minor candidates have shown limited momentum in the final weeks, keeping the two frontrunners far ahead. Traders price a substantial probability that Lula finishes first and Flávio second, with only modest scope for a late shift that would alter the ordering.