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U.S. midterm election betting volume tops 220 million dollars through September

  • U.S. midterm election betting volume tops 220 million dollars through September — Trading volume on Polymarket and Kalshi for the 2026 U.S. congressional midterms reached over 220 million dollars through September 30, up from 92 million dollars for the 2024 cycle. Activity is concentrated in a few headline races, with the top 1 percent of Polymarket wallets accounting for 70 percent of congressional betting volume. (Traders Union)

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