Recent first-round results on October 4 positioned Senator Flávio Bolsonaro ahead of incumbent President Luiz Inácio Lula da Silva with 47% to 45% of valid votes, advancing both to the October 25 runoff. Multiple post-election surveys, including Ipespe, AtlasIntel, Datafolha, and PoderData, show Flávio leading runoff simulations by 4–6 points among valid votes, reflecting momentum from the initial ballot and consolidation of right-leaning support. Lula’s campaign faces headwinds from voter perceptions on the economy and security, while historical patterns in Brazil indicate the first-round leader typically prevails. Traders price these dynamics as a decisive edge for Flávio, with limited time remaining for major shifts before the decisive vote.