Polymarket vs. Kalshi
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See where the two biggest prediction markets disagree. Pick any two markets, or start from the biggest gaps below: prices, volume, history and the resolution rules, side by side.
Will Simona Mohamsson be the next Prime Minister of Sweden?
Vol $0 today · $372.4K total
Will Ulf Kristersson become Prime Minister of Sweden following the 2026 Swedish general election?
Vol $1.4K today · $86.1K total
Kalshi is 14 points higher than Polymarket (15% vs 0%). They resolve on different dates (Sep 14 vs Jan 1), so they may not be exactly the same bet.
History starts when we first saw each market, so a newly added market has a short line.
| Polymarket | Kalshi | |
|---|---|---|
| Probability (Yes) | 0% | 15% |
| Change (24h) | +0.0 pt | +1.0 pt |
| Volume today | $0 | $1.4K |
| Total volume | $372.4K | $86.1K |
| Liquidity | $121.1K | — |
| Open interest | — | $38.4K |
| Resolves | — | 15mo |
| Tracked for | 6 days | 10 days |
Resolution rules: read both before trusting a gap
Polymarket
Parliamentary elections are scheduled to be held in Sweden on September 13, 2026. This market will resolve to the next individual who is officially appointed and assumes office as Prime Minister of Sweden following the next parliamentary election. To count for resolution, the individual must officially assume office. Any interim or caretaker Prime Minister will not count toward the resolution of this market. If no such Prime Minister assumes office by June 30, 2027, 11:59 PM ET, this market will resolve to “Other”. The primary resolution source for this market will be official information from the Government of Sweden; however, a consensus of credible reporting may also be used.
Kalshi
If Ulf Kristersson becomes Prime Minister of Sweden as a result of government formation following the 2026 Swedish general election and meets all constitutional requirements before Jan 1, 2028, then the market resolves to Yes.
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Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.