Currency dealers watch monitors as an electronic screen shows South Korea's benchmark stock index (top C) in a foreign exchange dealing room at the Hana Bank headquarters in Seoul on July 21, 2026. South Korea's president urged financial watchdogs to take "necessary measures" over new highly speculative investment products tied to the fortunes of the nation's AI chipmakers after share price declines left investors nursing losses. (Photo by Jung Yeon-je / AFP via Getty Images)