[Kalshi and Polymarket's Combined Trading Volume Reaches $44.8 Billion in June, Up 75% Month-on-Month] According to The Block, driven by the World Cup events, Kalshi and Polymarket's combined trading volume reached $44.8 billion in June, a 75% increase month-on-month, compared to $25.66 billion last month. Among them, Kalshi's volume rose from $16.81 billion to $31.5 billion, a month-on-month increase of 87.4%; Polymarket's main platform (non-US) increased from $7.08 billion to $10.26 billion, up 45% month-on-month; Polymarket US grew from $1.77 billion to $3.04 billion. Kalshi's World Cup champion prediction market has attracted over $832 million in bets, with approximately 35% betting on France to win; Polymarket's contracts for each World Cup match have drawn trading volumes between $500,000 and $2 million.