South Korea's KOSPI index closed at a new all-time high on Monday, driven by a surge in semiconductor stocks [1, 3].
The record suggests a deepening reliance on artificial intelligence infrastructure, as global tech demand fuels the valuation of South Korean chipmakers. This growth reflects a shift in investor confidence toward hardware essential for AI processing.
The KOSPI closed at 6,936.99 points [3], marking a percentage gain of 5.12% [3]. The rally was supported by significant buying from both foreign and institutional investors [1, 4].
SK Hynix saw its share price increase by over 12% during the session [1]. This jump pushed the company's market capitalization beyond 1,000 trillion won for the first time in its history [1].
The growth is attributed to the strong demand for AI-related semiconductor infrastructure [1, 4]. Big tech companies continue to increase their investments in AI memory, which has directly benefited the semiconductor maker [4].
While some reports cited a lower closing level of 6,615.03 points, the primary record-setting figure reached 6,936.99 points [3]. The Korea Exchange recorded the activity as the index moved toward a potential 7,000-point milestone [3].
Market analysts said the rally coincided with a broader trend of investors moving capital into high-growth tech sectors. The combination of institutional support, and the global AI boom provided the momentum necessary to break previous records [1, 4].
“KOSPI closed at a new all-time high”
The record-breaking performance of the KOSPI and SK Hynix underscores South Korea's pivotal role in the global AI supply chain. As big tech firms scale their AI capabilities, the demand for high-bandwidth memory creates a valuation floor for Korean chipmakers, making the national index increasingly sensitive to the trajectory of AI development rather than general macroeconomic trends.




