Flávio Bolsonaro holds a commanding lead in trader consensus for the October 25 runoff due to his first-round performance on October 4, where he secured 47% of valid votes against Lula’s 45%, advancing both candidates while consolidating right-wing support. Recent national polls from Datafolha, Quaest, and others show the race tightening to statistical ties or narrow edges for Flávio among valid votes, reflecting voter mobilization around the Liberal Party’s congressional gains and broader conservative momentum across Latin America. Lula’s mixed approval ratings and challenges consolidating left-leaning turnout continue to weigh on his position. With voting compulsory and turnout dynamics uncertain, the implied probability in this market captures traders’ assessment of these late-campaign factors ahead of final debate effects and last-minute court rulings.