Recent first-round results positioned Professora Dorinha (União Brasil) and Vicentinho Júnior (PSDB) for the October 25 runoff after a razor-thin contest, with Dorinha at 45.52% and Vicentinho at 43.94% of valid votes. Pre-election surveys from late September consistently showed the pair in a technical tie or narrow Dorinha edge in second-round simulations, often within the margin of error. Historical patterns in Tocantins indicate the first-round leader typically prevails, yet the minimal gap leaves room for modest swings driven by turnout shifts, late endorsements, or campaign momentum. Trader pricing reflects this uncertainty, assigning substantial weight to narrow victory margins under 7 points or alternative outcomes.