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Polymarket launches parlays in the US as Kalshi combos reach 3.5 billion dollars in weekly notional volume, Lines reports
- Polymarket launches parlays in the US as Kalshi combos reach 3.5 billion dollars in weekly notional volume, Lines reports — Polymarket US has launched parlay markets as Kalshi combos continue to dominate multi-leg trading, with Kalshi weekly combo notional at 3.5 billion dollars and InGame analysis finding 25 million dollars in Kalshi parlay taker fees in the first 16 days of August 2026. Polymarket parlay notional volume reached 8.7 million dollars by 7 p.m. ET on its launch day, with actual stakes of 1.2 million dollars, and the products differ structurally: Polymarket caps parlays at 10 legs while Kalshi permits combinations exceeding 30 legs. (Lines)
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