(DOW JONES) -- CME Group Inc. said it was the victim of a "cyberintrusion" in July, compromising the information of certain customers.
The futures-exchange operator said there is no evidence the event affected trades on its CME Globex exchange, which handles the majority of futures contracts in the U.S.
The incident is the subject of a federal criminal investigation, CME said. Customers were asked to change their credentials to protect them from the incursion, it said.
"CME Group takes these events very seriously and places a high priority on protecting its customers' information and ensuring the integrity of its markets," ...