South Korea's KOSPI plunges as chip stocks tumble
South Korea's KOSPI index dropped between 4% and 5% in mid‑July 2026, driven by sharp sell‑offs in its two biggest semiconductor makers. SK Hynix shares fell roughly 8%–9% and Samsung Electronics lost about 5%–6% on the same session, pulling the broader market lower.
The decline spread across Asian equity markets. Japan's Nikkei 225 slipped 1%–1.6%, while Hong Kong's Hang Seng fell close to 2%. Oil prices hovered near $79 a barrel as traders watched developments on the Strait of Hormuz. South Korean authorities responded to the volatility by signalling tighter rules on leveraged‑ETF exposure, including a possible 20% cap on positions, and retail investors are increasingly adopting trade‑journaling practices to manage the swings.
Overall, the episode underscores the sensitivity of regional markets to semiconductor valuations and the broader macro‑policy backdrop, including U.S. interest‑rate expectations and Middle‑East geopolitical risk.
Entities: AI spending · ASML Holding N.V. · Advanced Micro Devices Inc · Artificial intelligence (AI) sector · Foreign investors · KOSPI · KOSPI · KOSPI index · Korea Ministry of Finance · Nikkei 225 · Nikkei 225 · SK Hynix
Claims
What the coverage asserts, and how well corroborated each claim is across sources.
- [○ 1 SOURCE] The KOSPI later fell over 4% to 6,332.26 on June 6. (Market data)
- [○ 1 SOURCE] Foreign investors net bought about 2.99 trillion won of Korean stocks on June 5. (source)
- [● 3 SOURCES] SK Hynix dropped between 6% and 8% on June 6. (source)
- [○ 1 SOURCE] The KOSPI rose more than 4% to 6,625.88 on June 5. (KOSPI index data)
- [● 2 SOURCES] SK Hynix shares rose about 5.90% to 1,670,000 won on June 5. (source)
- [● 2 SOURCES] Samsung Electronics shares increased about 4.58% to 251,000 won on June 5. (source)
- [● 2 SOURCES] KOSPI fell more than 2% to 6,452.37 on June 6. (source)
- [● 3 SOURCES] Samsung Electronics fell about 4% on June 6. (source)
- [● 2 SOURCES] KOSPI rose more than 4% to about 6,603 points on June 5. (source)
- [● 5 SOURCES] KOSPI fell over 4% to about 6,332 points on the day of the sell‑off. (KOSPI drop >4% reported in multiple articles (f7094bef, 70608886, e7116713, af198b7b, 70d60f0e).)
- [● 5 SOURCES] The KOSPI decline triggered a sell‑side sidecar on KOSPI futures. (multiple articles)
- [● 7 SOURCES] Samsung Electronics shares fell about 6% on the same day. (Samsung Electronics shares fell about 6% on the same day)