Next Prime Minister of Sweden

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Market context

Parliamentary elections in Sweden are set for 13 September 2026, where voters will elect the 349 Riksdag members who subsequently appoint the Prime Minister. The market currently implies a 0% probability for any specific candidate, reflecting the consensus that the outcome remains entirely contingent on coalition negotiations following the vote, a pattern consistent with Sweden’s recent electoral history where no single party has secured an outright majority since 2014. In comparable cases like 2018 and 2022, the Prime Minister emerged only after weeks of deadlock and cross-party bargaining, meaning early market pricing on individuals is often valueless until the Riksdag formally elects the candidate.

The primary catalyst for traders is the election day itself and the immediate post-vote polling data, which will determine whether the Social Democrats (currently leading at 32.4%) can form a stable government or if a right-wing coalition involving Sverigedemokraterna (19.4%) becomes viable. Recent polls from PolitPro and Indikator Opinion confirm the Social Democrats’ frontrunner status, yet the value spot lies in contrarian bets on coalition dynamics rather than individual names, as the 0% implied probability suggests the market is ignoring the high likelihood of a multi-party government. Traders should monitor the official announcement of voting cards by 26 August and the live vote count on val.se, as these dependencies will clarify whether the Moderates or Sverigedemokraterna can leverage their 17% and 19% shares to force a leadership change. The consensus remains fixed on the election date, but the true value sits in anticipating the coalition arithmetic that will officially appoint the next Prime Minister.

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 Who Will Win — 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 Who Will Win, 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.

Is this market available outside the US?

Who Will Win is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 does it cost to trade on Who Will Win?

Zero. Who Will Win routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.