International derivatives marketplace CME Group has posted a notice of disciplinary action against Aristos Demetriou, a proprietary trader located in the United Kingdom.

Pursuant to an offer of settlement, in which Aristos Demetriou neither admitted nor denied the rule violation or factual findings upon which the penalty is based, a Panel of the NYMEX Business Conduct Committee found that on May 7, 2020, and May 12, 2020, Demetriou took action based on non-public order information that had been disclosed by an employee of a brokerage firm.

Specifically, after learning from another trader that the brokerage firm possessed large customer orders for July 2020-September 2020 Crude Oil calendar spread contracts to be traded later in the day, Demetriou entered orders on Globex based on this non-public order information.

Demetriou also failed to appear for a scheduled interview with Exchange staff in connection with the investigation.

The Panel found that as a result of the foregoing, Demetriou violated NYMEX Rules 532 and 432.L.1.

In accordance with the settlement offer, the Panel ordered Demetriou to pay a $100,000 fine and serve a 10-year suspension from access to any trading floor owned or controlled by CME Group and from direct and indirect access to any designated contract market, derivatives clearing organization or swap execution facility owned or controlled by CME Group, and from having a business affiliation with, be employed by, or have a financial or beneficial interest in a Member or broker association.

The suspension will run from trade date February 26, 2026, through, and including, trade date February 26, 2036.