Sweden’s September 13, 2026, parliamentary election delivered a narrow 176–173 seat majority to the centre-left bloc of Social Democrats, Left Party, Centre Party and Greens, over the incumbent Tidö alliance. This outcome has anchored trader consensus on Magdalena Andersson, the Social Democrats’ leader and designated prime ministerial candidate, who received a renewed mandate from the Speaker on October 2 after an initial exploratory round stalled over coalition terms. Ulf Kristersson, the caretaker Moderate prime minister, faces steeper obstacles in securing cross-bloc support while retaining Sweden Democrats backing. Smaller-party probabilities remain low because parliamentary arithmetic and party positioning continue to favor Andersson completing government formation before the October 12 reporting deadline.