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Unusual trading patterns on Kalshi and Polymarket are drawing scrutiny as experts debate whether reported volumes reflect organic market activity.
Top US prediction market sites for October 2026 ✔️ Trade on sports, politics & economics ✔️ Fees & markets compared.
Blask data through August 2026 shows Polymarket at 57.8% BAP share for branded search demand versus Kalshi at 35.8%. Kalshi led August trading at $37.17 billion against Polymarket’s combined $8.16 billion. The gap underscores separate measurements of attention and liquidity in US prediction markets.…