South Korea’s KOSPI climbed to a new all-time high after adding approximately ₩305 trillion ($220 billion) in market value during the latest rally.
The index surged roughly 4% to 8,380 points, led primarily by gains in Samsung Electronics and SK Hynix, which rose about 6.5% and 9.5% respectively.
Together, the two semiconductor giants now account for roughly 42% of the entire KOSPI index.
AI Semiconductor Boom Powers South Korea
The rally reflects surging global investor demand for semiconductor companies tied to artificial intelligence infrastructure and memory chip production.
Samsung and SK Hynix have become major beneficiaries of explosive demand for AI memory systems, high-bandwidth memory, and advanced semiconductor components used in AI accelerators and data centers.
Analysts say South Korea’s market has increasingly become a leveraged play on the global AI boom due to the country’s dominant role in memory chip manufacturing.
The KOSPI has now surged roughly 25% during May alone, adding approximately $900 billion in total market capitalization.
Investor optimism has been fueled by expectations that AI-related semiconductor shortages could continue supporting elevated pricing and profit margins across the industry.
Global Capital Flows Into AI Infrastructure
The rally highlights how artificial intelligence is increasingly concentrating market gains around semiconductor-heavy indices and infrastructure-related companies worldwide.
South Korean equities have attracted major international capital inflows as investors aggressively seek exposure to AI supply chains beyond the United States.
Analysts note that memory chips have become one of the most critical components of AI systems, significantly boosting the strategic importance of South Korean semiconductor firms.
At the same time, some strategists caution that market concentration around a small number of AI-related companies may increase volatility risks if sentiment shifts.
Still, momentum across AI infrastructure assets remains exceptionally strong as governments, cloud providers, and enterprises continue ramping up computing investment globally.
The broader takeaway is that artificial intelligence is rapidly reshaping global stock markets, turning semiconductor manufacturers into some of the world’s most valuable and influential companies.
