CME Technical Issue Keeps Some Customers From Connecting Nick Baker and Sheela Tobben – Bloomberg (SUBSCRIPTION) CME Group Inc., the world's biggest exchange operator, experienced a technical malfunction Wednesday that prevented some traders from accessing the market. "We're experiencing a technical issue that is impacting connectivity for some customers," the company said in a statement. "Our markets remain open while we work directly with customers to resolve the issue." /goo.gl/oucg2u