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Kalshi hits 19 billion dollars in a single week as Polymarket US volume nearly triples, Prediction Authority reports
- Kalshi hits 19 billion dollars in a single week as Polymarket US volume nearly triples, Prediction Authority reports — Kalshi reached 19.03 billion dollars in weekly contract volume for the week of October 5 to 11, 2026, the highest single-week figure in its history, according to Prediction Authority. Polymarket US domestic volume nearly tripled over the past six weeks, and the industry had cleared 409.7 billion dollars across about 2.6 billion trades by early October. (Prediction Authority)
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