Next Prime Minister of Sweden

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Market context

The parliamentary election in Sweden is set for 13 September 2026, where voters will elect 349 members of the Riksdag who then appoint the next Prime Minister. On Polymarket, this contract currently trades with Magdalena Andersson at 76% and Ulf Kristersson at 23%, while the crowd-implied probability for any other outcome sits at 0%. The market resolves to the individual who officially assumes office after the election, excluding interim caretakers, with conditional tokens on Polygon redeemable for USDC upon settlement.

Historically, Swedish prime ministerial transitions have been predictable when one party dominates the polls, as seen in the 2018 and 2022 elections where Socialdemokraterna’s lead translated directly into Andersson’s appointment. Current polling mirrors this pattern, with Socialdemokraterna holding 32.4% versus Sverigedemokraterna’s 19.4%, suggesting a clear frontrunner rather than a fragmented coalition scenario that might delay resolution[2]. This historical precedent frames the 0% probability for “Other” as rational, given the strong single-party lead.

Traders should monitor the official election schedule, coalition negotiations post-13 September, and any foreign malign information campaigns the Swedish government is actively countering ahead of the vote[6]. The election authority’s security measures and the Psychological Defence Agency’s warnings about misinformation are critical dependencies that could influence voter turnout or coalition stability[7]. A snap election is unlikely, as the parliamentary term would not reset, keeping the September date fixed alongside regional and municipal elections[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Next Prime Minister of Sweden on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Legit?, 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.

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.

What does it cost to trade on Polymarket Legit??

Zero. Polymarket Legit? 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.

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.