Open interest drops 20% as World Cup热度 fades on Kalshi and Polymarket

Odaily Planet Daily News On the eve of the World Cup final, the combined open interest on Kalshi and Polymarket fell 20% from the peak of approximately $2 billion in early July, dropping from nearly $1.8 billion to around $1.5 billion. Kalshi's sports event trading volume peaked at around $9 billion in the week of July 5 and then fell to about $4 billion, while Polymarket's dropped from approximately $2.3 billion to $740 million. During the World Cup, sports events accounted for about 80% of the total trading volume on both platforms. Spain defeated Argentina 1-0 on Sunday to win its second World Cup title. A total of 194,000 addresses participated in trading on Polymarket's World Cup winner market, with about two-thirds incurring losses.