Sweden’s September 13, 2026 Riksdag election remains the decisive event shaping trader sentiment on the next prime minister, with recent polling averages showing the Social Democrats holding a consistent lead that positions Magdalena Andersson as the clear frontrunner. The April announcement by incumbent Ulf Kristersson to grant the Sweden Democrats formal cabinet roles and major influence over immigration policy within a potential four-party majority government has intensified scrutiny of the current Tidö coalition’s stability and contributed to the modest implied probability assigned to Kristersson or Jimmie Åkesson. Minor-party candidates trail far behind, reflecting limited parliamentary leverage in coalition formation. Traders appear to weigh the Red-Green bloc’s projected seat majority and Andersson’s prior governing experience against the right’s internal realignments and economic record, consistent with historical patterns of Swedish bloc-based parliamentary outcomes.