Korea Zinc Co. is currently in a critical situation as the deadline for a proposed share buyback approaches. The chairman's plan to repurchase shares at a premium will end on Wednesday, adding to the ongoing battle for control of the world's largest zinc smelter.

Last month, Young Poong Corp., the largest shareholder, along with private equity firm MBK Partners Ltd., made an unsolicited cash offer to acquire the company, which has caused significant tension among major investors and highlights the importance of determining the future direction of Korea Zinc.