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Owning both sides of a sports game cost 3.90 cents per dollar on Kalshi and 3.57 cents on Polymarket US in the week ending November 2, Tater Research finds
- Owning both sides of a sports game cost 3.90 cents per dollar on Kalshi and 3.57 cents on Polymarket US in the week ending November 2, Tater Research finds — Tater Research measured the two-sided cost, fees included, across 170 games in the week ending November 2 at 3.90 cents per dollar of payout on Kalshi and 3.57 cents on Polymarket US, against 4.42 cents at a typical sportsbook. On settled games Polymarket US posted a Brier score of 0.375 and Kalshi 0.380, against 0.382 for sportsbooks on the same games. (Tater Research)
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