The September 2026 Swedish parliamentary election delivered a narrow three-seat majority to the center-left bloc led by Social Democrats head Magdalena Andersson, prompting incumbent Ulf Kristersson to resign and triggering government-formation talks under the Riksdag speaker. Andersson’s initial mandate stalled in late September after the Left Party withdrew support amid disagreements over parliamentary leadership and coalition terms, returning the process to negotiations that could still favor her bloc given its seat advantage and the Social Democrats’ status as the largest party. Traders assign her an 80.5% implied probability, reflecting the structural edge of the winning alliance and historical patterns of post-election majorities prevailing despite delays, while Kristersson retains residual backing at 15% as a potential fallback if cross-bloc cooperation remains blocked. Upcoming speaker consultations and any renewed coalition attempts within the 349-seat Riksdag continue to shape near-term probabilities.