In brief
Polymarket traders strongly favor Magdalena Andersson to become Sweden's next Prime Minister after the September 13, 2026 parliamentary election, pricing her at 83.5%. Incumbent Ulf Kristersson trails at 14.5%, while every other named candidate is at 0.5% or below. Our analysis agrees with this direction and assigns an internal probability of 80% to Andersson.
Introduction
Sweden's next parliamentary election is scheduled for September 13, 2026. In the final stretch of the campaign, Polymarket has made the contest look lopsided: Magdalena Andersson is the overwhelming favorite to become the next Prime Minister. Sitting Prime Minister Ulf Kristersson is listed as a distant second, and a cluster of smaller party leaders sits below 1%. This article assesses the race using verified sources available on September 2, 2026.
What to know
The event resolves to the next individual who is officially appointed and assumes office as Sweden's Prime Minister following the parliamentary election. Interim or caretaker prime ministers do not count, and the market resolves to Other if no such appointment has occurred by June 30, 2027. Those rules are set out on the Polymarket event page.
Ulf Kristersson is still the incumbent. On August 31, 2026, he welcomed French President Emmanuel Macron in Stockholm for the signing of a €4.3 billion contract for four frigates, according to Bloomberg and the Swedish Government. On September 1, his government said its VAT reduction had lowered food prices, with Deputy Prime Minister Ebba Busch citing estimated household savings from the cut, as Reuters reported.
The possible role of the far-right Sweden Democrats has become a central campaign question. Al Jazeera reported on September 1 that Liberal leader and Education Minister Simona Mohamsson announced in May 2026 that her party would allow the Sweden Democrats to participate in a future government, and that Jimmie Åkesson offered a handshake which she accepted. The Guardian reported on August 30 that Kristersson had mused earlier this year that if his four-party coalition won the election, the far right could enter government, a statement seen as a watershed for Swedish politics.
Officials have also warned about external interference. Le Monde quoted Estonian Defense Minister Hanno Pevkur saying that Sweden's election on September 13 and Latvia's on October 3 are opportunities for Russia to try to influence societies and stoke tensions.
The market numbers
As of September 2, 2026, the Polymarket event for the Next Prime Minister of Sweden shows total volume of $4,387,630.855 and total liquidity of $1,141,678.282. The event is set to close on September 13, 2026. Source: Polymarket.
| Outcome | Implied probability |
|---|---|
| Magdalena Andersson | 83.5% |
| Ulf Kristersson | 14.5% |
| Jimmie Åkesson | 0.5% |
| Ebba Busch | 0.3% |
| Anna-Karin Hatt | 0.1% |
| Nooshi Dadgostar | 0.1% |
| Simona Mohamsson | 0.1% |
| Amanda Lind | 0.1% |
| Daniel Helldén | 0.1% |
| Elisabeth Thand Ringqvist | 0.1% |
The factors at play
- Incumbent's final-week platform: Kristersson has been visible on defense and the economy just before the election. He signed the €4.3 billion frigate contract on August 31 (Bloomberg), and his government is promoting its VAT reduction as a food-price win (Reuters).
- The far-right question: Reports from Al Jazeera and The Guardian show how the Sweden Democrats' possible path into government has become a flashpoint. This could consolidate the right-wing vote or alienate centrist voters; the market's low Kristersson number suggests traders see the latter as more likely.
- Market concentration: The market places 83.5% of implied probability on Andersson. This is a clear signal, but it is a market price, not a polling result.
- External interference risk: Le Monde's report shows officials are worried about Russian attempts to influence Sweden's election, adding a tail risk to any forecast.
- Resolution rule: If no new prime minister takes office by June 30, 2027, the market resolves to Other, a reminder that the outcome is not decided only on election night.
Our prediction
According to our analysis, the most likely outcome is Magdalena Andersson. Polymarket currently assigns a probability of 83.5%, while our internal estimate is 80%. The difference stems from these factors: the market prices a very high probability of a post-election transition to Andersson, but Sweden's proportional representation and post-election coalition talks can produce unexpected compromises; Kristersson is still the incumbent and can shape the closing weeks through government action; and the Other resolution tail, while small, is not zero.
Risks and uncertainties
- Kristersson's coalition remains viable: If the center-right bloc wins a governing path, Kristersson could remain Prime Minister; the market gives him 14.5%.
- Arithmetic around the Sweden Democrats: A deal involving the Sweden Democrats could create a coalition majority that does not need Andersson.
- Post-election bargaining failure: If no one can form a government by June 30, 2027, the market will resolve to Other.
- Late campaign volatility: No current polling snapshot is included in the verified sources, and warnings about disinformation underline the final-week uncertainty.
- Market limitations: Political event markets are not polls; liquidity and resolution design can affect prices.
Conclusion
The verified sources and market pricing point in the same direction: Magdalena Andersson is the most likely next Prime Minister of Sweden. The race is not a certainty, and Swedish coalition politics can be unpredictable, but the baseline case is clear.
This content is for informational purposes only and does not constitute financial, political or investment advice, betting advice, or any operational recommendation.