Morningstar analyst warns: AI boom may not be sustainable, South Korean chip stocks may experience a significant drop due to minor negative news.

According to the 36Kr Finance app, Jing Jie Yu, a stock analyst at Morningstar, who gave a "sell" rating to both SK Hynix and Samsung Electronics, stated that South Korean chip stocks have risen to a level where valuations are difficult to justify, and any slight negative news could trigger a significant pullback.