[Polymarket, Polymarket US, and Kalshi Set Record Highs in July Trading Volume, Totaling $50.6 Billion] According to data from The Block, the total trading volume of Polymarket, Polymarket US, and Kalshi reached a record high of $50.6 billion in July. Among them, Polymarket US saw a 54% increase in trading volume, reaching $5 billion, while Polymarket's trading volume dropped by 26% to $7.9 billion.