According to CoinMeta, as reported by CryptoPolicy, the combined trading volume of Kalshi and Polymarket reached $50.59 billion in July, setting a new historical high, representing a 7.8% increase from $46.95 billion in June. Among them, Kalshi led with a trading volume of $37.7 billion, showing a month-on-month growth of 14%. The trading volume of Polymarket decreased by 26% to $7.9 billion, while the trading volume of Polymarket US increased by 54% to $5 billion. This surge in trading volume is mainly attributed to the 2026 FIFA World Cup; Kalshi attracted approximately $1.9 billion in transactions in the prediction market for the final, and Polymarket's predictions about the World Cup champion drew around $4 billion. Despite the increased trading activity, the prediction market still faces legal scrutiny in the United States, with regulatory authorities in several states having accused Kalshi and Polymarket of operating unlicensed gambling platforms.