Korea Zinc Co. has seen a decrease in its operating profit for the third quarter, causing concern among investors due to the lack of information regarding its planned $1.8 billion share sale.

The share issuance is being investigated by the Financial Supervisory Service, which is looking into potential misconduct related to the company's recent financial activities. The company, which is the largest producer of refined zinc globally, is currently facing a power struggle between two major shareholder groups.

The announcement of the share sale came shortly after a significant buyback, which surprised the market and resulted in a sharp decline in the company's stock price. This situation has attracted the attention of regulatory authorities, highlighting the complexities surrounding corporate governance and shareholder interests within the company.