International derivatives marketplace CME Group has posted a notice of disciplinary action against Jonathan Jungk.

Pursuant to an offer of settlement in which Jonathan Jungk neither admitted nor denied the rule violations or factual findings upon which the penalty is based, a Panel of the Chicago Board of Trade (CBOT) Business Conduct Committee found that on multiple occasions from September 1, 2022, through March 1, 2024, Jungk entered orders in Corn Options, U.S. Treasury Bond Futures, U.S. Treasury Bond Options, 10-Year T-Note Options, and Soybean Options markets opposite another account with common beneficial ownership.

Jungk entered the orders where he knew or reasonably should have known the purpose of the orders was to avoid taking a bona fide market position exposed to market risk.

The Panel found that as a result of the foregoing, Jungk violated CBOT Rule 534.

In accordance with the settlement offer, the Panel ordered that Jungk pay a fine in the amount of $80,000 ($40,000 of which is allocated to CBOT) and suspended Jungk’s 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 for a period of 10 business days.

The suspension will begin on trade date December 19, 2025, and continue through and include trade date January 5, 2026.