In South Korea, fellow chip makers SK Hynix and Samsung Electronics rose 13% and 5.4%, respectively, helping propel the benchmark index to another record high. Many major Asian indexes were closed on Friday for the May Day holiday, meaning investors were playing catch-up—and opted to double down on some of the chip makers and Big Tech names benefiting from the AI boom when they returned. President Donald Trump on Sunday laid out a plan to escort commercial vessels through the waterway, although tensions escalated after Asian markets closed on Monday when Iranian state media reported that two missiles had hit a U.S. frigate.