Sweden Parliamentary Election Winner
Short Answer
Both the model and the market overwhelmingly agree that the Swedish Social Democratic Party (S) is most likely to win the 2026 Swedish parliamentary election, with only minor residual uncertainty. Opinion polls as of early August 2026 show the Social Democrats with a commanding lead.
1. Executive Verdict
- Social Democrats hold a commanding lead in July-August opinion polls.
- Prediction markets widely favor the Social Democrats to win most seats.
- Sweden Democrats and Moderates, though trailing, lead the current government coalition.
Who Wins and Why
| Outcome | Market | Model | Why |
|---|---|---|---|
| Sweden Democrats (SD) | 0.8% | 0.8% | Current polling shows the Sweden Democrats significantly behind, also experiencing a setback in 2024 European elections. |
| Moderate Party (M) | 0.5% | 0.5% | Current polling places the Moderate Party substantially behind the Social Democrats, and their bloc's support has declined. |
| Green Party (MP) | 0.1% | 0.1% | The Green Party consistently polls far behind the leading parties, with no evidence of competitiveness. |
| Swedish Social Democratic Party (S) | 98.8% | 98.0% | Polling data and prediction markets as of July-August 2026 widely show the Social Democrats with a commanding lead. |
| Centre Party (C) | 0.1% | 0.1% | The Centre Party consistently polls far behind the leading parties, with no evidence of competitiveness. |
Current Context
Sweden's next general election for the Riksdag is scheduled for September 2026. The general election is set for Sunday, September 13, 2026 [^][^][^]. Early voting for the 2026 elections began on August 26, 2026, with postal voting for citizens abroad starting as early as July 30, 2026 [^][^]. Sweden utilizes a unicameral parliamentary system [^].
2. Market Behavior & Price Dynamics
Historical Price (Probability)
Outcome probability
Date
This market is pricing a very low probability for the Swedish Social Democratic Party (S) to win the most seats in the 2026 parliamentary election. The contract has moved within a tight range of 0.5% to 1.7% since its inception. After opening at 1.5%, the price saw a decline to its current level of 0.7%. The most significant move was a drop from 1.6% to 0.7% in early August 2026. The provided context, which details the election timeline, does not contain a specific catalyst for this price change.
Critically, the market has recorded zero trading volume. This indicates the price fluctuations are not driven by trader activity. Instead, they likely reflect adjustments in the market's automated pricing mechanism or the initial parameters set by the market creator. The lack of participation means traditional technical analysis concepts, such as support or resistance levels, are not meaningful here. The price does not represent a consensus view or any level of market conviction. While the current 0.7% price implies long odds for the Social Democrats, it is an unconsolidated price point without validation from actual trades.
3. Market Data
Contract Snapshot
Here are the contract rules for the Kalshi prediction market:
1. YES resolution trigger: A "YES" resolution occurs if the specific political party wins the greatest number of seats in the Swedish Parliament (Riksdag) in the election. 2. NO resolution trigger: A "NO" resolution occurs if the specific political party does not win the greatest number of seats. If the election does not take place by December 31, 2026, the market will resolve to "Other," implying all specific party contracts resolve to "NO." 3. Key dates/deadlines: The Swedish parliamentary election is scheduled for September 13, 2026. Voting must occur by December 31, 2026, 11:59 PM ET; otherwise, the market resolves to "Other." 4. Special settlement conditions: Resolution is based solely on the number of seats won. In case of a tie for the most seats, the party with more valid votes wins; if still tied, the party whose abbreviation appears first alphabetically wins. The Swedish Election Authority (Valmyndigheten) is the definitive source for official results if reporting is ambiguous.
Available Contracts
Market options and current pricing
| Outcome bucket | Yes (price) | No (price) | Last trade probability |
|---|---|---|---|
| Swedish Social Democratic Party (S) | $0.99 | $0.02 | 99% |
| Sweden Democrats (SD) | $0.01 | $0.99 | 1% |
| Moderate Party (M) | $0.01 | $1.00 | 1% |
| Centre Party (C) | $0.00 | $1.00 | 0% |
| Christian Democrats (KD) | $0.00 | $1.00 | 0% |
| Citizens' Coalition (MED) | $0.00 | $1.00 | 0% |
| Green Party (MP) | $0.00 | $1.00 | 0% |
| Left Party (V) | $0.00 | $1.00 | 0% |
| Liberals (L) | $0.00 | $1.00 | 0% |
| Other | $1.00 | $1.00 | 0% |
| Party A | $1.00 | $1.00 | 0% |
| Party B | $1.00 | $1.00 | 0% |
| Party C | $1.00 | $1.00 | 0% |
| Party D | $1.00 | $1.00 | 0% |
| Party E | $1.00 | $1.00 | 0% |
| Party F | $1.00 | $1.00 | 0% |
| Party G | $1.00 | $1.00 | 0% |
| Party H | $1.00 | $1.00 | 0% |
| Party I | $1.00 | $1.00 | 0% |
| Party J | $1.00 | $1.00 | 0% |
| Party K | $1.00 | $1.00 | 0% |
| Party L | $1.00 | $1.00 | 0% |
| Party M | $1.00 | $1.00 | 0% |
| Party N | $1.00 | $1.00 | 0% |
| Party O | $1.00 | $1.00 | 0% |
| Party P | $1.00 | $1.00 | 0% |
| Party Q | $1.00 | $1.00 | 0% |
| Party R | $1.00 | $1.00 | 0% |
| Party S | $1.00 | $1.00 | 0% |
| Party T | $1.00 | $1.00 | 0% |
| Party U | $1.00 | $1.00 | 0% |
| Party V | $1.00 | $1.00 | 0% |
| Party W | $1.00 | $1.00 | 0% |
| Party X | $1.00 | $1.00 | 0% |
| Party Y | $1.00 | $1.00 | 0% |
| Party Z | $1.00 | $1.00 | 0% |
Market Discussion
Traders overwhelmingly anticipate the Swedish Social Democratic Party (S) to win the upcoming parliamentary election, with its probability hovering around 98.6%. This strong sentiment is driven by the party's consistent and commanding lead in recent opinion polls, averaging about 32%, significantly ahead of other parties like the Sweden Democrats and Moderates, and supported by its historical position as the largest party. While potential late-campaign shifts or coalition changes are acknowledged, market analysis indicates these are unlikely to overcome the substantial polling advantage before election day.
4. Which key policy debates are most likely to influence undecided voters in the lead-up to the September 2026 election?
| Election Date | September 13, 2026 (Sweden) [^][^] |
|---|---|
| Key Policy Debates | Gang crime, cost of living, migration/integration, economic performance [^][^] |
| Government Polling | Lower polling numbers [^][^][^] |
Four key policy debates dominate Sweden's 2026 election discourse. The Swedish parliamentary election on September 13, 2026, is expected to see undecided voters influenced primarily by ongoing discussions about gang crime, the cost of living, migration and integration policies, and the nation's overall economic performance [^][^]. These topics form the core of political discourse in the lead-up to the election.
Crime policy is a major point of contention between parties. This issue has become a significant area of dispute, with the government emphasizing crime reduction, while the opposition highlights concerns such as the recruitment of minors into criminal networks and persistent bomb attacks [^][^]. The incumbent right-wing government, which is backed by the Sweden Democrats through the Tidö Agreement, is currently experiencing a decline in polling numbers. In response, the opposition, led by the Social Democrats, is concentrating its efforts on welfare spending and economic stability [^][^][^].
5. How do the potential coalition-building prospects for the Social Democrats compare with those for the Moderate Party?
| Social Democrats Polling Lead | 30-34% [^][^][^][^][^] |
|---|---|
| Social Democrats Prediction Market | 92-98% probability [^][^][^][^][^] |
| Next Election Date | September 13, 2026 [^][^][^][^][^] |
The Social Democrats currently lead polling and prediction markets, requiring strategic coalition-building for government formation. For the upcoming September 13, 2026, parliamentary election, they hold approximately 30-34% in polls and a 92-98% probability of securing the most seats [^][^][^][^][^]. Their path to forming a government largely depends on successfully building a coalition, particularly with smaller parties such as the Centre Party, which historically opposes the Sweden Democrats but shares certain economic perspectives with the right-wing bloc [^][^][^].
The Moderate Party's government faces significant challenges, heavily relying on the Sweden Democrats' support. Currently, the Moderate Party leads the governing Tidö coalition, which receives external support from the Sweden Democrats [^][^][^]. This administration is contending with issues including governing fatigue, the implementation of austerity measures, and internal policy disagreements. The continued stability of the Moderate-led government remains highly contingent on the ongoing cooperation of the Sweden Democrats, whose influence through the Tidö Agreement is a critical, though debated, element of the current administration [^][^][^].
6. What does historical data from the 2022 election indicate about the accuracy of final-month polls for the Social Democrats versus the Sweden Democrats?
| Social Democrats Vote Share (2022) | 30.33% [^][^] |
|---|---|
| Sweden Democrats Vote Share (2022) | 20.54% [^][^] |
| 2022 Election Poll Outcome | Polls predicted narrow center-left victory, but right-wing bloc secured narrow majority [^][^] |
The 2022 Swedish election saw strong performances from two major parties. In the 2022 Swedish general election, the Social Democrats emerged as the largest party, securing 30.33% of the total vote [^][^]. The Sweden Democrats also achieved a significant share, garnering 20.54% of the vote in the same election [^][^].
Pre-election polls struggled to predict the ultimate 2022 election outcome. Leading up to the election, final-month polls and exit polls commonly indicated a very tight contest, frequently forecasting a narrow victory for the center-left bloc [^][^]. This prediction, however, diverged from the final results, as the right-wing bloc ultimately secured a narrow majority [^][^]. Polling surveys consistently showed the Social Democrats' center-left camp either slightly ahead of or tied with the right-wing opposition, revealing difficulty in accurately assessing the strength of the main political blocs [^][^].
7. What official data is available for tracking early voting turnout in the weeks before the September 13 election, and what did these trends suggest in 2022?
| 2026 Swedish Early Voting Period | August 26 - September 13 [^][^] |
|---|---|
| 2022 Swedish Early Voting Turnout | 47.9% of all votes (approximately 3.1 million) [^][^][^] |
| Swedish Official Data Sources | Swedish Election Authority (Valmyndigheten) and Statistics Sweden (SCB) [^][^][^] |
The initial query likely conflates U.S. primaries with Swedish election dates. The next Swedish Parliamentary Election is not scheduled for September 13, 2026 [^]. For the 2026 Swedish general election, early voting will be available from August 26 through September 13 [^][^]. Official data for early voting in Sweden is collected by the Swedish Election Authority (Valmyndigheten) and Statistics Sweden (SCB) [^][^][^]. However, this data is typically released post-election rather than provided as real-time public trackers during the early voting period [^].
Early voting reached record levels in Sweden's 2022 general election. In that election, approximately 3.1 million votes, representing 47.9% of all votes cast, were submitted as advance votes before election day [^][^][^]. Research into these trends suggests that early voting is crucial for increasing participation among groups that traditionally exhibit lower turnout, underscoring its significance in the Swedish electoral system [^]. The 2022 Swedish parliamentary election ultimately resulted in a victory for the right-wing bloc [^].
8. What underlying demographic trends and regional results since 2022 support the current polling levels for the Sweden Democrats?
| SD Current Polling | 19-20% (August 2026) [^][^][^][^] |
|---|---|
| SD 2022 Election Result | 20.5% [^][^][^][^] |
| SD 2024 EU Election Support | 13% [^] |
The Sweden Democrats' polling shows a slight decrease since 2022. As of August 2026, the Sweden Democrats (SD) are polling at approximately 19-20%, which represents a modest decline from their 20.5% result in the 2022 general election [^][^][^][^]. Critical issues such as gang-related violence, the cost of living, immigration, and energy policy were instrumental in driving the party's growth leading up to 2022 [^][^]. However, recent trends indicate a potential loss of momentum for the party within the broader right-wing coalition framework [^][^].
A European election setback marked their first electoral regression. The Sweden Democrats experienced a significant decline in support during the 2024 European Parliament elections, where their polling fell to 13% [^]. This event marked the first instance of electoral regression for the party when compared to a previous corresponding national or European vote [^]. Concurrently, current polling data reveals that the incumbent right-wing governing bloc, which includes SD, has seen its overall support drop to 42.6% from 49.6% in 2022, while the opposition centre-left bloc has increased its support to 55.2% [^].
9. What Could Change the Odds
Key Catalysts
As of early August 2026, prediction markets and aggregated forecasting platforms, including Botten Ada and Polymarket, indicate a strong lead for the centre-left bloc [^] [^] [^] [^] . The Swedish Social Democratic Party (S), fronted by Magdalena Andersson, is widely favored, holding significant polling and market probability leads over Prime Minister Ulf Kristersson's governing coalition [^][^][^][^]. Preliminary results are expected on election night, September 13, 2026, with final official results announced approximately one week later [^]. The new Riksdag is scheduled to convene for its first session on September 28, 2026 [^].
Key Dates & Catalysts
- Closes: September 13, 2026
10. Decision-Flipping Events
- Trigger: Sweden's next general parliamentary, regional, and municipal elections are scheduled for September 13, 2026 [^] [^] [^] .
- Trigger: Early voting will run from August 26, 2026, through election day, September 13, 2026 [^] [^] .
- Trigger: Overseas postal voting became available starting July 30, 2026 [^] [^] .
- Trigger: As of early August 2026, prediction markets and aggregated forecasting platforms, including Botten Ada and Polymarket, indicate a strong lead for the centre-left bloc [^] [^] [^] [^] .
12. Historical Resolutions
No historical resolution data available for this series.
