High-priority alert based on source significance and keyword relevance.
Context
What happened: South Korea's stock market saw repeated trading halts and a sell-off even as Samsung Electronics reported record quarterly operating profits, with the disconnect pointing to reliance on a single industry.
Key numbers: Samsung Electronics reported unprecedented quarterly operating profits.
Why it matters: The sell-off reflects US inflation concerns, doubts over AI infrastructure financing, and Chinese memory chip competition. The article argues Korea's chip-dependent growth model is vulnerable and structural reform is needed.