Flávio Bolsonaro of the Liberal Party maintains a dominant position in trader expectations for second place in Brazil’s October 4 first-round presidential vote, backed by consistent polling showing him trailing incumbent Luiz Inácio Lula da Silva by roughly eight to twelve points while outpacing all other declared candidates. Recent Liberal Party and Mission Party conventions formalized Bolsonaro and Renan Santos as nominees, reinforcing the two-candidate structure visible in Datafolha, AtlasIntel, and Quaest surveys through late July. A May-June audio scandal involving Bolsonaro temporarily elevated his rejection rating, yet it has not altered his standing as the clear opposition frontrunner. Lula’s stable 40-plus percent first-round support, combined with elevated undecided shares near 10 percent, leaves limited room for challengers such as Ronaldo Caiado or Romeu Zema to close the gap before the vote.