[Data: Polymarket's weekly trading volume surpasses Kalshi for the first time, reaching $1.93 billion] BlockBeats News, March 9, according to statistics from Polymarket trader Car, the prediction market continues to thrive. Polymarket's trading volume last week reached $1.93 billion, surpassing Kalshi's $1.87 billion for the first time. The weekly trading volumes for Probable, Opinion, and Predict.Fun were $133 million, $132 million, and $55 million, respectively.