CME Group says its ClearPort system was hacked

CME ClearPort home page
Source: CME ClearPort

CME Group, the world's largest futures exchange operator, said Friday one of its clearing systems was hacked in July, and the incident is the subject of a federal criminal investigation.

Certain customer information relating to CME ClearPort, which clears contracts mainly tied to energy, was compromised, CME said in a statement.

There is no evidence that trades were adversely impacted or that CME's other clearing services were disrupted, it said.

(Read more: Cyberplayers duke it out in a World Series of hacking)

CME is cooperating with law enforcement in its investigation, the statement said.

—By Reuters