South Korea’s stock market is experiencing unprecedented gains driven by artificial intelligence-related semiconductor stocks, with the KOSPI index up 78% this year, outpacing every other major market globally, according to Financial Modeling Prep data cited in an Axios analysis.
AI Concentration in South Korean Market
If the U.S. stock market is now largely a bet on the AI boom, then South Korea’s market is a supersized, turbocharged version of that wager. The rally in South Korean AI stocks has lifted Samsung Electronics, the world’s biggest maker of memory chips, to a $1 trillion-plus market value. Samsung becomes the second Asian company after Taiwan Semiconductor Manufacturing to join the elite $1 trillion club, which also includes Nvidia, Apple and Alphabet.
Performance Metrics
Samsung Electronics has surged 111% this year, while rival memory chip maker SK Hynix has climbed 144% this year. These two semiconductor companies account for more than 40% of the KOSPI index weight.
The KOSPI’s 78% year-to-date gain significantly outpaces all other major global indices. Taiwan’s blue-chip index, the closest competitor, is up 45% this year. By comparison, the S&P 500 is up nearly 8% year to date.
The KOSPI has already exceeded its previous record-breaking annual advance from 2025, when it ended the year up 76%.
Risk Considerations
While investors’ optimism about the promise of AI is global, such a concentration of wealth in one sector could be risky in a market downturn, as the semiconductor and AI-related stocks dominate South Korea’s benchmark index.
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