The U.S. Justice Department’s investigation into Archer-Daniels-Midland’s ethanol trading desk raises regulatory concerns for the commodities company. ADM’s stock has dipped by approximately 15% since the disclosure of the internal probe and suspension of its CFO in late January.

The U.S. Justice Department is investigating Archer-Daniels-Midland’s (ADM) ethanol trading operation as part of a broader probe into the commodities giant’s accounting practices, Reuters reports. Sources familiar with the matter reveal that the investigation, conducted by the U.S. Attorney’s Office for the Southern District of New York (SDNY), focuses on whether ADM improperly accounted for hedges in its ethanol trading unit.

ADM, a $28 billion company known for producing animal feed, sweeteners, and ethanol, recently confirmed the Justice Department’s scrutiny of its Nutrition unit’s accounting practices. The investigation now extends to ADM’s ethanol trading operation, indicating a broader examination of the company’s financial reporting. While ADM asserts its cooperation with authorities, investigations do not imply wrongdoing.

The news has already impacted ADM’s stock performance, with shares dropping approximately 15% since the company disclosed its internal probe and the suspension of its CFO in late January. ADM competitors have also filed lawsuits related to its ethanol business, further complicating the company’s legal landscape.