KOSPI Market Capitalization 2025 Surge: South Korea's $2.7 Trillion AI Milestone
South Korea's KOSPI market capitalization surged nearly 80% in 2025, reaching $2.69 trillion. Samsung and SK hynix led the best annual performance since 1999.
South Korea's stock market just pulled off its most impressive feat in decades. Driven by an insatiable hunger for AI chips, the total market value of listed companies has skyrocketed by nearly 80% in a single year.
The AI Boom and KOSPI Market Capitalization 2025 Surge
According to the Korea CXO Institute, the total valuation of local shares hit 3,972 trillion won (approx. US$2.69 trillion) as of early January 2026. This represents a massive 76.2% leap from the previous year's 2,254 trillion won. The benchmark KOSPI index itself climbed 75.7% throughout 2025.
| Company | Previous Market Cap | Current Market Cap | Growth |
|---|---|---|---|
| Samsung Electronics | 318 Trillion KRW | 760 Trillion KRW | +139% |
| SK hynix | 124 Trillion KRW | 492 Trillion KRW | +297% |
| KOSPI Index | 2,398.94 | 4,214.17 | +75.7% |
Samsung and SK hynix Lead the Charge
The rally's heavy lifters were none other than the semiconductor giants. Samsung Electronics saw its value more than double to 760 trillion won. Meanwhile, SK hynix witnessed a staggering nearly fourfold increase to 492 trillion won. Other notable climbers included Hanwha Aerospace and Doosan Enerbility, benefiting from the global energy and defense demand.
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