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 Santiago Abascal become Prime Minister of Spain following the next Spanish general election?
Vol $1.5K today · $7.7K total
Kalshi is 6 points higher than Polymarket (6% vs 0%). They resolve on different dates (Oct 27 vs Aug 22), 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% | 6% |
| Change (24h) | +0.0 pt | +1.0 pt |
| Volume today | $0 | $1.5K |
| Total volume | $0 | $7.7K |
| Liquidity | — | — |
| Open interest | — | $6.1K |
| Resolves | 9d | 22mo |
| Tracked for | 9 days | 9 days |
Resolution rules: read both before trusting a gap
Polymarket
Legislative elections are schedule to be held in Israel on October 27, 2026. This market will resolve to the next individual who is officially appointed and sworn in as Prime Minister of Israel following the 2026 parliamentary election. If an election is called early, this market will immediately resolve to the individual who is officially appointed and sworn in after that election. To count for resolution, the individual must be formally sworn in. Any interim or caretaker Prime Minister will not count toward the resolution of this market. If no such Prime Minister is sworn in by December 31, 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 Israel; however, a consensus of credible reporting may also be used.
Kalshi
If Santiago Abascal becomes Prime Minister of Spain as a result of government formation following the next Spanish general election and meets all constitutional requirements before Aug 22, 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.