Shares of QTREX Quantum Ltd. (QTEX) dropped more than 7% on Tuesday. Reports of a regulatory probe triggered the sell-off and created uncertainty regarding the company's outlook. The decline represents a significant pullback for the volatile micro-cap stock. Analysts flag the company as high-risk due to negative returns on assets. The company also reports negative returns on equity.

This downturn follows a sharp rally on Monday linked to a manufacturing milestone. A major U.S. interconnect manufacturer recently integrated the company's Additively Manufactured Electronics (AME) system into its production line. QTREX recently pivoted its operations from medical devices to quantum computing. The company also regained compliance with Nasdaq listing standards prior to the probe reports.