KOSPI Falls 3% Below 5,700; KOSDAQ Also Weak

Samsung Electronics, SK hynix down around 4%; foreign investors and institutions net sellers
KOSDAQ semiconductor stocks fall sharply... hovering near 710

As concerns over the profitability of artificial intelligence (AI) persist, the KOSPI has fallen more than 3% and is hovering around the 5,600 mark. The KOSPI is also down more than 2%.

Stock market indices are displayed on a screen at the dealing room of Hana Bank's headquarters in Jung-gu, Seoul, on Nov. 3, as the KOSPI opened down 143.89 points (2.46%) at 5,715.19. 2026.11.3 Photo by Kim Hyunmin

As of 9:16 a.m. on Nov. 3, the KOSPI was trading at 5,669.70, down 3.23% (189.38 points) from the previous trading day. By investor type, individual investors were net buyers of KRW 1.157465 trillion, while foreign and institutional investors were net sellers of KRW 644.193 billion and KRW 464.976 billion, respectively.

Most sectors were weaker. Medical and precision instruments (-5.25%), electrical and electronic equipment (-4.51%), machinery and equipment (-3.34%), construction (-3.12%), and chemicals (-2.89%) were among the sectors in decline. By contrast, some sectors, including pharmaceuticals (1.51%), electricity and gas (0.98%), and telecommunications (0.79%), were firm to flat.

Among the top companies by market capitalization, all of the four largest were down more than 3%: Samsung Electronics, ranked first, fell 4.3%; SK hynix, ranked second, fell 4.9%; SK Square, ranked third, fell 5.1%; and Samsung Electro-Mechanics, ranked fourth, fell 4.1%. Samsung Life Insurance (-4.9%), Doosan Enerbility (-4.1%), and SK (-3.8%) also posted steep declines. Hyundai Motor (3.0%) and Hyundai Mobis (0.8%) were firm to flat.

The KOSDAQ was trading at 713.97, down 2.78% (20.39 points). Individual investors were net buyers of KRW 155.295 billion, while foreign and institutional investors were net sellers of KRW 92.58 billion and KRW 51.701 billion, respectively.

All sectors were weaker except publishing and media reproduction (2.22%). Machinery and equipment (-5.00%), electrical and electronic equipment (-3.55%), nonmetallic minerals (-3.49%), and manufacturing (-3.48%) were among the sectors down more than 3%.

Among the top companies by market capitalization, all three largest were lower: Alteogen, ranked first, fell 0.2%; EcoPro, ranked second, fell 2.0%; and EcoPro BM, ranked third, fell 1.6%. Semiconductor-related stocks posted steep declines, including EO Technics (-7.4%), Jusung Engineering (-6.1%), and Wonik IPS (-6.1%).

“Despite a favorable macroeconomic environment, including simultaneous declines in oil prices and interest rates on expectations for negotiations between the United States and Iran, domestic stocks opened lower amid the fallout from a correction in U.S. AI stocks,” said Han Ji-young, a researcher at Kiwoom Securities. “Although Palantir posted an earnings surprise, its shares weakened in after-hours trading, which could contribute to volatility in the domestic market.”

This content was produced with the assistance of AI translation services.