Kalshi, Polymarket open interest falls 20% as World Cup frenzy winds down

The surge in trading activity on platforms like Kalshi and Polymarket during the World Cup has started to taper off, with open interest dropping by 20% as the tournament excitement fades. Sports betting accounted for an overwhelming 80% of both platforms' total volumes during the tournament weeks, highlighting the significant impact of major sporting events on these markets. This decline underscores how temporary spikes in interest can significantly influence market dynamics, suggesting a potential shift as users turn their attention to other events or markets.