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 LeBron James announce his retirement before the 2027-28 NBA season?
42%
▲ +3.5pt
Vol $44 today · $7.8K total
Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.