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USA TODAY test finds NFL share of Kalshi and Polymarket volume rose from about 59 percent in Week 1 to 69 percent by October 11
- USA TODAY test finds NFL share of Kalshi and Polymarket volume rose from about 59 percent in Week 1 to 69 percent by October 11 — USA TODAY analyzed Kalshi and Polymarket US trading data to test the NFL's Supreme Court brief claim that 1.8 billion dollars of 3.3 billion dollars traded on the first Sunday of the 2026 season was NFL-related. It found the figures roughly accurate, with NFL-related trades at 59 percent of notional volume on September 13 and 69 percent by October 11, and representatives of both platforms confirmed the findings were directionally accurate. (USA TODAY)
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