**Vučić's September 27 resignation, prompted by sustained student-led protests over alleged corruption tied to the 2024 Novi Sad canopy collapse, activated Article 120 of the Serbian Constitution.** This requires a presidential election within three months, with Acting President Ana Brnabić (National Assembly speaker and SNS ally) holding authority to call it. The vote must occur by late December 2026 at latest, following the October 25 snap parliamentary election where Vučić heads the SNS list for prime minister. Traders focus on Brnabić's procedural role and any post-parliamentary timeline signals, as the constitutional clock and institutional sequence directly shape resolution timing amid ongoing political transition.