SEOUL, July 13, 2026 (BSS/AFP) - South Korea's Kospi stock index plunged more than five percent Monday morning as tech firms suffered another bout of heavy selling fuelled by concerns over the AI investment boom.

The Kospi sank 5.6 percent to 7,058.82 in early exchanges, while chip titan SK hynix dived 10.1 percent, even after its US shares soared more almost 13 percent on the New York debut on Friday.