Swedish Riksdag Election (September 13, 2026): Socialdemokraterna (S) receives more than 27.5% of votes cast (confirmed by Valmyndigheten by September 14, 2026)
Pending
✦ AI-generated prediction
Published on 10. September 2026
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Predicted for 13. September 2026
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Based on: Statistical Pattern
The Social Democrats (S) are currently Sweden's leading party in polls: Novus (September 7, 2026) shows S at 27.0%, Indikator Opinion (September 4) at 27.9%, the PolitPro 30-day aggregate at ~28.7%. No active Polymarket market for the S vote share; calibrated independently. Historically S achieved 30.3% (2022), 28.3% (2018), 31.0% (2014), 30.7% (2010) — above 27.5% in all four most recent Riksdag elections. The threshold sits just below the current poll aggregate, leaving a buffer for typical election-day variance. S leads all parties with a substantial margin over SD (~20%).
Data basis for this prediction
- Novus Riksdag-Umfrage 07.09.2026: Socialdemokraterna 27,0 % (statsskuld.se via Novus)
- Indikator Opinion Umfrage 04.09.2026: Socialdemokraterna 27,9 % (politpro.eu)
- PolitPro 30-Tage-Aggregat Schweden: S ~28,7 % (politpro.eu/en/sweden, Stand 10.09.2026)
- Valmyndigheten: Historische Riksdag-Ergebnisse S: 30,3% (2022), 28,3% (2018), 31,0% (2014)
Verdict: Pending
This prediction is still open. It will be evaluated automatically against real-world sources after its due date.
🏛️ Politics
✦ AI
The SPD received exactly 18.4% in the 2023 Berlin state election and has since been in opposition. Current polls (August/September 2026) put the SPD at 19–22%, making a result above 18.0% likely. Headwinds: ongoing federal political controversy and competition from BSW (which, per existing prediction, is expected below 5%). The 18.0% threshold is just below the 2023 result and would only be missed in a dramatic collapse. No Polymarket market; Metaculus aggregate implies ~65% for SPD above 18%.
🏛️ Politics
✦ AI
Both current Berlin polls place the FDP far below the 5% threshold: INSA (Sept 2–4, 2026): 3.0%; Infratest dimap (Aug 27–31, 2026): FDP below the statistical detectable threshold. The Berlin FDP has not reached the 5% mark in any poll since spring 2026. Clearing the hurdle would require a simultaneous systematic error of 2+ points from both institutes — historically near-unprecedented. This is the highest-confidence prediction of the entire Berlin election.
🏛️ Politics
✦ AI
Current polls show Liberalerna well below the 4% threshold: Indikator Opinion (fieldwork to September 4, 2026): 2.2%; PolitPro election trend (as of September 9, 2026): 2.7%. Neither institute identifies meaningful upward momentum. The party was part of the Tidö coalition but suffered from its image problems. Even with maximum systematic polling error of +1.5 points, Liberalerna would remain below 4.2%. Failing to enter the Riksdag would cost the governing coalition its parliamentary majority.