Michael Vukmir, a nonmember, settled allegations brought by the Chicago Mercantile Exchange that, from June 1, 2016, through September 1, 2017, he engaged in spoofing-type conduct involving Class III Milk futures contracts. According to CME, during this time, he layered large orders on one side of the market to effectuate executions of smaller orders he placed on the other side of the market. To resolve this matter, Mr. Vukmir agreed to pay a fine of US $15,000 and be prohibited from accessing all CME Group markets for three months. Separately, Jian Shi and Ziao Xu were permanently banned by the business conduct committee of the Commodity Exchange, Inc. from any access to any CME Group market for not participating in a COMEX staff investigation or answering unspecified charges filed against them.