South Korea's KOSPI swings sharply amid semiconductor stocks and US market moves

KOSPI Samsung Electronics SK Hynix semiconductor stocks foreign investors

On June 5, the South Korean KOSPI surged more than 4% to around 6,603 points, regaining the 6,600 level. The rally was led by semiconductor giants Samsung Electronics, which rose about 4.5% to 251,000 won, and SK Hynix, up roughly 5.9% to 1,670,000 won. Foreign investors were net buyers, purchasing about 2.99 trillion won of Korean equities.

The next day, June 6, the index reversed course, falling over 2% to 6,452 points as SK Hynix dropped between 6% and 8% (as much as 8% in pre‑market trading) and Samsung Electronics slipped about 4%. The decline pushed the KOSPI below the 6,300 line. The volatility was linked to a pull‑back in U.S. semiconductor stocks, profit‑taking and broader market sentiment.

Other Korean market segments showed mixed moves: the KOSDAQ recorded strong gains in AI, robotics and communications stocks, while several large‑cap semiconductor shares experienced sharp sell‑offs. Overall, the swings highlighted the sensitivity of South Korea’s equity market to semiconductor performance and global risk factors.

Entities: Altiogen Inc. · Foreign investors · KOSDAQ · KOSDAQ · KOSPI · KOSPI · SK Hynix · SK Hynix Inc. · Samsung Electronics · Samsung Electronics Co., Ltd. · South Korea

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)
[○ 1 SOURCE] KOSPI fell over 4% to about 6,332 points on June 6. (source)