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 Ethereum reach $10,000 by December 31, 2026?
Vol $515 today · $907.2K total
Will the S&P 500 Index be above $10,000 before Dec 31, 2027?
Vol $0 today · $234 total
Kalshi is 8 points higher than Polymarket (9% vs 1%). They resolve on different dates (Jan 1 vs Dec 31), 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) | 1% | 9% |
| Change (24h) | +0.0 pt | -1.0 pt |
| Volume today | $515 | $0 |
| Total volume | $907.2K | $234 |
| Liquidity | $126.6K | — |
| Open interest | — | $234 |
| Resolves | 56d | 14mo |
| Tracked for | 28 days | 28 days |
Resolution rules: read both before trusting a gap
Polymarket
This market will immediately resolve to “Yes” if any Binance 1-minute candle for Ethereum (ETH/USDT) between November 24, 2025, 14:00 and December 31, 2026, 23:59 in the ET timezone has a final “High” price equal to or greater than the price specified in the title. Otherwise, this market will resolve to “No.” The resolution source for this market is Binance, specifically the ETH/USDT “High” prices available at: https://www.binance.com/en/trade/ETH_USDT with the chart set to “1m” (one-minute candles) on the top bar. Please note that the outcome of this market depends solely on the price data from the Binance ETH/USDT trading pair. Prices from other exchanges, different trading pairs, or spot markets will not be considered for the resolution of this market.
Kalshi
If the value of the S&P 500 Index is above $10,000 at any point after Issuance and before Dec 31, 2027, 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.