ASML and semiconductor equipment stocks rallied following a major investment announcement. Samsung Electronics and SK Hynix will invest approximately $518 billion (800 trillion won) in new infrastructure. The plan includes the construction of four new fabrication plants in southwestern South Korea.

This investment aims to boost production of high-bandwidth memory (HBM) for the AI sector. The project expands South Korea's manufacturing footprint beyond the Seoul region.

ASML anticipates sustained demand for its exclusive EUV lithography machines from these key clients. This long-term expansion secures a strong outlook for future equipment orders.