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Kalshi held 75.6% of tracked prediction market volume in the 30 days to October 7
- Kalshi held 75.6% of tracked prediction market volume in the 30 days to October 7 — A Datawallet comparison puts Kalshi at 75.6% of tracked volume in the 30 days to October 7, 2026, ahead of Polymarket US at 11.6% and Polymarket international at 5.3%. Open interest on October 7 was $2.5 billion on Kalshi compared with $339 million on Polymarket international. (Datawallet)
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