[Prediction Platform Polymarket Has Begun Live Testing of Its U.S. Exchange] According to Bloomberg, the prediction platform Polymarket has quietly opened its U.S. exchange to select users and started matching trades, initiating live testing in preparation for its planned relaunch in the U.S. market. The platform stated that the exchange is fully operational, with some users trading real contracts, and it is currently working on completing the final steps required to open the exchange. Founder Shayne Coplan said: 'The U.S. exchange is essentially live and operational, with users gradually gaining access. This is effectively in the testing phase.'