Next Prime Minister of Sweden

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Market context

Parliamentary elections to elect Sweden’s 349 Riksdag members are set for 13 September 2026, with the newly elected parliament subsequently choosing the next Prime Minister. The current crowd-implied probability of 0% for any specific individual to become Prime Minister reflects the market’s pre-election uncertainty, as no candidate has yet secured a formal mandate or coalition backing.

Historically, Swedish prime ministerial appointments following elections have rarely been immediate; they typically involve complex coalition negotiations, especially when no single party commands a majority. In the 2018 and 2022 elections, the process took weeks, with the Social Democrats leading but requiring allies to form a government. Given that Socialdemokraterna currently leads polls at 32.4%, followed by Sverigedemokraterna at 19.4% and Moderaterna at 17.2%, the likelihood of a fragmented outcome remains high, framing the 0% probability as a rational placeholder rather than a dismissal of all contenders[2].

Traders should monitor upcoming coalition announcements, internal party leadership races, and any shifts in polling data, particularly as the election date approaches. The Swedish government has also launched initiatives to protect the 2026 election from foreign malign information influence, adding a layer of geopolitical dependency to the political process[4]. Recent polling trends from PolitPro indicate stable support for the major parties, but small fluctuations could significantly alter coalition dynamics, making daily updates from reliable sources essential for tracking emerging probabilities[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Next Prime Minister of Sweden across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Best Prediction Markets — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Best Prediction Markets, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Best Prediction Markets triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.