Kalshi vs Polymarket

Wild Horse Nine Rotten Tomatoes score?: Above 87: Kalshi vs Polymarket odds

The price to buy each side on each site, updated 2 minutes ago. Kalshi closes this market on November 9, 2026.

SideKalshiPolymarket
Yes99¢99¢
No2¢4¢

A price of 47¢ means the market puts it at about 47%; each contract pays $1 if it happens. Green is the cheaper site for that side. Best ask only, before fees.

Covering both sides costs 101¢ right now (No on Kalshi + Yes on Polymarket), so there's no gap to lock in at these prices. Gaps open and close in minutes; ArbTrader watches this market and pings you when one pays.
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On the sites: Kalshi · Polymarket · Polymarket calls it “Will "Wild Horse Nine" score at least 87 on the Rotten Tomatoes Tomatometer?”

Why are Kalshi and Polymarket prices different?

They're separate exchanges with different traders, fees and rules, so the same question can trade at different prices. When buying opposite sides on the two sites costs less than $1 after fees, you can lock in the difference whoever wins, as long as both sites settle the question the same way. Read the step-by-step guide or how Kalshi vs Polymarket arbitrage works.

We match markets across the two sites by title, dates and rules; check both sites' rules before trading. Prices can change at any moment. Not financial advice. ArbTrader isn't affiliated with Kalshi or Polymarket.