Samsung surges 275% as AI memory trade expands

Samsung Electronics climbed roughly 275% over the past year, becoming a top large-cap AI trade. DI Corp, the Korean semiconductor equipment maker tied to the Gangnam Style frenzy, gained about 40% through its Digital Frontier unit supplying HBM4 wafer testers to SK Hynix. The iShares MSCI South Korea ETF dropped 14% Friday.