Every rally eventually runs into a wall, and South Korea's artificial intelligence (AI) stocks just found theirs. The Kospi Composite Index ($KSIC) has tumbled more than 40% from its June peak, and the primary trigger came from SK hynix (SKHY), the very company that helped fuel the rally in the first place. The tech giant delivered solid Q2 FY2026 numbers, yet it couldn't clear Wall Street's sky-high bar.
The Nvidia Corporation (NVDA) supplier posted a record quarterly operating profit that shot up more than sixfold. This is a number that most companies would frame and hang on the wall. But shipment delays on several advanced products slowed pricing gains for its flagship DRAM chips, and investors punished the stock anyway, knocking it down 8.98% on Wednesday, July 29.