South Korea’s Stock Market Rollercoaster
Aug 28, 2026 · 11m
Summary
WSJ’s Tech News Briefing covers how to safely buy refurbished phones, with Nicole Nguyen warning of malware and warranty pitfalls. The episode also examines South Korea’s volatile stock market, dubbed the “Roller KOSPI,” driven by chip giants Samsung and SK Hynix. Reporter Jack Pitcher details how retail investors suffered massive losses during a recent AI-driven market correction, highlighting risks of concentrated exposure.
Topics discussed
Intro: AI value from rethinking workflows
Show intro: Refurbished phones and South Korea stocks
Defining refurbished phones and common defects
Spotting issues and warranty advice
Malware risks and phone age limits
Transition to South Korea stock market volatility
The 'Roller Kospi' and AI stock correction
Rise of 'Ants': Individual investors in Korea
Investor losses and market crash impact
Chip demand, profit taking, and psychology
Lessons on diversification and current status
Outro and production credits
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