Traders see the 75–80% turnout range as most probable for Peru’s June 7 presidential runoff because mandatory voting, combined with a polarized contest between Keiko Fujimori and Roberto Sánchez, has historically sustained participation near first-round levels of 73.81%. Recent confirmation of the narrow first-round results and the short three-week campaign window limit opportunities for major mobilization shifts, while lingering effects from polling delays and administrative complaints in April could modestly dampen enthusiasm in some regions. A tight race with limited undecided voters keeps both campaigns focused on turnout operations, supporting the clustered probabilities around 70–80%. Late developments such as intensified get-out-the-vote efforts, fresh scandals, or changes in weather or security conditions near election day could still alter final participation rates within the resolution window.