Socialdemokraterna (S) become the largest party in the Swedish Riksdag election (September 13, 2026)
Pending
✦ AI-generated prediction
Published on 5. September 2026
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Predicted for 13. September 2026
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Based on: Statistical Pattern
All five most recent polls show Socialdemokraterna under Magdalena Andersson clearly in first place: Indikator (Sept. 4): 27.9%; Verian (Sept. 3): 29.2%; Demoskop (Sept. 1): 27.2%; Ipsos (Aug. 25): 30.3%. PolitPro aggregate (Sept. 5): S 28.9% — gap to Sverigedemokraterna (19.6%) around 9 percentage points. The left-wing opposition (S+V+MP+C) leads in all recent polls by 3–8 points. The forecast is consistent with the already open prediction 'SD second-largest party' and 'Tidö coalition loses majority'. No prediction market price available; own estimate: 84%.
Data basis for this prediction
- Indikator (4. Sept. 2026): S 27,9 %, SD 19,3 %, M 18,4 %
- Verian (3. Sept. 2026): S 29,2 %, SD 18,9 %, M 16,4 %
- PolitPro Schweden-Aggregation (5. Sept. 2026): S 28,9 %, SD 19,6 %, M 17,3 %
- Wikipedia Opinion Polling Sweden 2026 (Stand 5. Sept. 2026): S in allen 5 jüngsten Umfragen auf Platz 1
Note: This is an AI-generated statistical forecast for entertainment and information purposes. It does not constitute investment advice or a recommendation to buy or sell any financial instrument.
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.