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Prediction markets post 3.9 billion dollars in a single week as Kalshi extends lead over Polymarket, ChainUp reports
- Prediction markets post 3.9 billion dollars in a single week as Kalshi extends lead over Polymarket, ChainUp reports — ChainUp reported prediction markets reached 3.9 billion dollars in volume in a single week in October 2026, with Kalshi posting a record week and extending its lead over Polymarket by roughly 1 billion dollars. The report said parlay-style combo contracts, borrowed from the sportsbook playbook, were the fastest-growing product surface in the category. (ChainUp)
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