Worldwide Markets Roiled by Data-Center Snafu in Chicago Suburb

The CyrusOne data center in Aurora, Illinois on Nov 28.Photographer: Jim Vondruska/Bloomberg

One of the first signs of trouble arrived at 9:41 p.m. Eastern time on Thursday, when most of Wall Street was shut and traders were still enjoying the Thanksgiving holiday in the US.

“Due to technical issues,” CME Group Inc. said in a one-line email to clients, its futures and options “markets have been halted.”