Trader consensus on 80-82% turnout in Brazil’s presidential runoff reflects the success of mobilization drives by Lula’s campaign to reverse the first-round abstention rate of 21.08%, the highest since 1998. Targeted efforts to transport supporters, engage older voters, and reduce absences in PT strongholds produced a measurable increase, with final participation reaching approximately 80.8% and abstention falling to 19.21%, the lowest second-round figure in two decades. This outcome aligned with historical exceptions in tight, polarized contests where participation rises rather than declines. Scenarios that could still have shifted the range lower included extended rain, transport failures, or court-ordered voting adjustments that failed to materialize on election day.