WSJ Tech News Briefing WSJ Tech News Briefing

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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