Prediction Market Open Interest Drops as World Cup Trading Fades

TLDR: Prediction market open interest declined after the World Cup, while Kalshi kept about 59% and retained leadership over Polymarket. Polymarket market share rose from roughly 27% to 41% as capital left smaller platforms faster than it exited the two leading venues. Kalshi still lists 28,996 markets against Polymarket’s 8,040, showing a wider product base [...]

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