SK Hynix slumped in South Korea after a solid Nasdaq debut, hitting the Kospi, which is halted for trading.
Chip stocks sold off across the broader Asian markets, led by declines for Samsung.
Oil prices jumped on renewed tension in the Strait of Hormuz.
U.S. and Iran traded strikes as the future of the ceasefire hangs in the balance.
Earnings are in focus, with JP Morgan and Netflix in the U.S., ASML in Europe and TSMC in Asia.
