KOSPI Surges 100% in 2026 as AI Chip Stocks Trigger Korea’s Biggest Rally in Decades

Key Takeaways

• KOSPI surged roughly 100% in 2026, rivaling
the Nasdaq 100’s gains during the dotcom era
• Samsung and SK Hynix now account for nearly
half of the benchmark index as AI chip stocks
continue dominating global markets
• SK Hynix crossed a $1 trillion valuation while
leveraged semiconductor ETFs attracted billions
in inflows from retail investors

KOSPI has emerged as one of the strongest-performing major indexes this year. The South Korean stock market is now up close to 100% in 2026. This is largely driven by AI chip stocks linked to Samsung and SK Hynix stock. As global money continues flowing into artificial intelligence infrastructure, investors are looking at Korean semiconductor companies as some of the biggest beneficiaries of the AI boom.

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How Samsung and SK Hynix Turned Korea Into the Center of the AI Chip Rally

South Korea’s benchmark KOSPI index recently climbed above 8,400 for the first time. This was aided by strong gains in chipmakers tied to AI servers and data centers.

According to reports, SK Hynix crossed the $1 trillion market cap mark this week. It joined Samsung and Micron as AI-related memory chip demand continues to grow.

Samsung stock and SK Hynix stock have become the main drivers of the South Korean stock market this year. Together, both these companies now make up nearly half of the KOSPI by market capitalization.

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AI Chip Stocks Continue Attracting Global Inflows

The rally is also being supported by growing ETF demand. Leveraged funds tied to Korean semiconductor stocks have seen strong inflows in recent months. This is because retail and institutional investors look for exposure to the AI trade.

Reports even suggest that the KOSPI’s gains in 2026 are already nearing the Nasdaq 100’s rise during the peak of the dotcom era in 1999.

Analysts say the move is being backed by fundamentals rather than short-term speculation alone. Demand for high-bandwidth memory chips used in Nvidia AI systems continues to outpace supply. It is helping push up prices and earnings expectations for major chipmakers.

Despite this, the rally has also highlighted how concentrated the KOSPI has become. Much like Taiwan’s market with TSMC, South Korea’s index is increasingly tied to the performance of a small number of semiconductor companies.

At present, investors continue to see Korean chipmakers as one of the clearest ways to gain exposure to the global AI buildout.

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