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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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Kalshi Sports

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.