SK Hynix union turmoil may impact HBM capacity expansion

Negotiations between SK Hynix and the union over performance bonuses paid in the form of company stock have reached a stalemate. Some employees are pushing for the establishment of a new, unified union. According to Odaily, a preparatory committee for the unified union has already been formed, and related online communities have attracted about 4,000 employees, accounting for 11.6% of the company’s total workforce.

Market observers worry that if labor-management disputes spread to the production lines, it could introduce uncertainty to SK Hynix’s HBM capacity expansion plans in the second half of the year. The company has already begun mass production and deliveries of HBM4 in the second quarter, and plans to further expand output in the second half. Production has not yet been affected, but if tensions escalate on the manufacturing side, it may put pressure on supply schedules of major customers such as Nvidia.

The “butterfly effect” in the semiconductor supply chain is often underestimated. From the shipping cadence of HBM4 to expectations for AI computing power supply, and then to the pace of Nvidia product iterations—every link is connected. This seemingly distant labor dispute at a South Korean factory may, in fact, be adding a variable to the outlook for global AI hardware supplies.

What do you think about the potential impact of this labor dispute on HBM supply? Feel free to leave a comment and discuss.