**Serbian presidential election timing is shaped by Aleksandar Vučić’s September 27, 2026 resignation amid sustained student-led protests over the 2024 Novi Sad railway station collapse and governance concerns.** His second term was set to end in mid-2027, but constitutional limits barred a third run, prompting the move to pursue the prime minister role after the October 25 snap parliamentary vote. Ana Brnabić now serves as acting president, with the new parliament expected to schedule the presidential contest. Serbian law requires the vote by late December 2026 at latest, though it could occur earlier once parliamentary results clarify the path to government formation. Traders are weighing the rapid sequence of events, protest pressure, and institutional timelines that compress the election window into the final months of 2026.