[Closing Market] KOSPI Plunges Below 5,400 on Blue Wave Fears
On Nov. 5, the KOSPI index fell 5.28% to 5,383.80 points, its largest drop in history, due to concerns over U.S. tech regulations and AI stock impacts. Foreign investors sold a record 3.4 trillion won ($2.53 billion) worth of stocks. Samsung Electronics and SK Hynix, major semiconductor stocks, saw significant declines of 7.57% and 9.4% respectively. The KOSDAQ index also fell 5.11% to 678.41 points.
How this was made
The 30-second read
Why it matters
The sharp index decline and heavy foreign net selling suggest heightened risk for Korean tech and battery stocks.
Market read
The sell‑off highlights systemic risk for Korean tech equities amid global AI‑regulation concerns.
What to watch
Potential policy support from Korean authorities could mitigate the sell‑off if stabilization measures are announced.
Background
The article reports a historic one‑day plunge in South Korea's equity markets driven by AI‑regulation fears and US election outcomes.
Ticker impact
Samsung Electronics fell over 7% intraday, breaching the 200,000‑won support line amid foreign selling.
likely further downside as foreign net selling continues
The article cites a record 3.4 trillion‑won foreign net sell and a 7% price decline, indicating strong bearish pressure.
SK hynix dropped more than 9% after foreign investors cut exposure to Korean semiconductors.
potential further weakness if foreign net selling persists
The article reports a 9.4% intraday fall linked to the same foreign selling wave.
Market effects
Korean semiconductor and battery sectors face heightened volatility due to foreign capital outflows.
The KOSPI and KOSDAQ indices fell over 5%, signaling broader regional risk aversion.
The sell‑off reflects global concerns over AI‑related regulation and US midterm election outcomes.
Counterpoint
If foreign investors overreact, a short‑term bounce could occur as domestic investors step in.
Key entities
- companySamsung Electronics
Largest Korean semiconductor maker, fell >7%.
- companySK hynix
Second‑largest Korean chipmaker, fell >9%.
- indexKOSPI
South Korean benchmark index, down 5.28%.


