SK Hynix shares plunge 15% in Seoul—worst day ever—as investors take profits after 13% Nasdaq debut Friday; analysts cite confusion over AI chip demand, valuation gap between US and Korean listings.

SK Hynix South Korean shares clock worst day, sinking over 15%, after stellar Nasdaq debut

SK Hynix Inc. signage at the company's office in Seongnam, South Korea, on Tuesday, June 30, 2026. SeongJoon Cho | Bloomberg | Getty ImagesSK Hynix shares tumbled more than 15% in Seoul on Monday to clock their worst day after the chipmaker's strong Nasdaq debut, as investors booked profits and weighed demand for artificial intelligence memory chips against the stock's sharp gains this year.Shares of the chip giant closed 15.4% lower on Monday, posting the largest fall in history, data from LSEG...