Svmuu reported that Polymarket's monthly trading volume in April fell approximately 8.9% to $10.2 billion, marking its first month-over-month decline since August last year. In comparison, rival Kalshi saw its trading volume rise about 13% to $14.8 billion in April. The overall prediction market recorded a total trading volume of approximately $29.8 billion in April, up 12.4% month-over-month. Polymarket is attempting to fully reintegrate into the U.S. market, while American lawmakers are intensifying regulatory scrutiny of prediction markets.