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.
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Will the S&P 500 be between 7600 and 7799.99 on Dec 31, 2027 at 4pm EST?
9%
▼ 3.5pt
Vol $0 today · $706 total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.