October 30, 2026 KOSPI Market Brief — What to Watch Before the Korean Open
★ Alphabet −12.64%, Nasdaq −1.38%. About $500 billion in market value gone. SOX −1.42%, Micron −4.98%. Worries that AI search could eat into Google's ad business added to the spending concerns. ★ But it wasn't a market-wide sell-off. Russell 2000 +1.01%, Dow −0.25%. Money leaving tech moved into small caps, healthcare and financials (sector rotation)….