International derivatives marketplace CME Group today posted a notice of disciplinary action against proprietary trading firm Optiver Australia Pty Limited.

Pursuant to an offer of settlement in which Optiver Australia neither admitted nor denied the rule violations or factual findings upon which the penalty is based, a Panel of the Chicago Mercantile Exchange (CME) Business Conduct Committee found that between October 2, 2023, and November 2, 2023, Optiver Australia Pty Limited created and executed trades in various covered User Defined Spreads (UDS) related to E-mini S&P 500 options and December 2023 E-mini S&P 500 futures contracts on the Globex electronic trading platform and entered order quantities combined with delta levels that resulted in Optiver receiving advantageous over-allocations or under-allocations of futures contracts associated with the covered instrument.

As a result of the activity, Optiver Australia realized a profit of $80,853.43.

The Panel concluded that as a result of the foregoing, Optiver Australia Pty Limited violated CME Rule 575.D.

In accordance with the settlement offer, the Panel ordered Optiver Australia Pty Limited to pay a $60,000 fine and to disgorge profits in the amount of $80,853.43.

The effective date of the disciplinary action notice is January 16, 2026.