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Jun Young-hyun

Jun Young-hyun

Vice Chairman and Co-Chief Executive, Samsung Electronics (Device Solutions)

Appears in 1 story

Stories

AI memory chip boom reshapes South Korea's stock market

Money Moves

Leading Samsung's semiconductor recovery and HBM4 production ramp

South Korea's benchmark KOSPI stock index crossed 6,000 points for the first time on February 25, 2026, completing its climb from 5,000 to 6,000 in just 34 trading days—the fastest thousand-point advance in the index's history. The index has gained 43% since January and 76% in 2025, making Seoul's market the best-performing major bourse in the world. Two companies explain most of the move: Samsung Electronics and SK Hynix, which together account for roughly 40% of the KOSPI's market capitalization and produce approximately 80% of the world's high-bandwidth memory (HBM) chips—the specialized components that artificial intelligence data centers cannot run without.

Updated Feb 25