- The 60-day correlation between the Korea Composite Stock Price Index and the Nasdaq 100 Index has risen to about 0.50, the highest since 2021. This is mainly due to the increased weight of memory chip giants in the Korean stock market and their deep integration into the global AI hardware supply chain.
- The share of global dynamic random-access memory (DRAM) demand from data centers has exceeded half. Tech giants in the US and Korea heavily rely on capital expenditures from cloud service providers, leading to a significant reduction in the risk hedging effect of traditional geographically diversified configurations.
- Korean memory giants release their financial reports about two weeks earlier than their American counterparts and provide the first liquidity market feedback during US stock market closures, becoming a core indicator of global AI trading and risk preferences.
Reconstruction of Correlation and Transformation of Index Attributes
The 60-day correlation coefficient between the Korea Composite Stock Price Index (KOSPI) and the Nasdaq 100 Index has climbed to 0.50, indicating that Asian capital markets are highly synchronized with the US tech sector. Samsung Electronics (005930:KS) and SK Hynix (000660:KS) together account for more than half of KOSPI's market value, directly transforming the index into a semiconductor-themed index. Investors are losing the geographic diversification benefits of traditional international asset allocation due to asset concentration in a single hardware cycle.
Cloud Capital Expenditure Drives Industry Chain Resonance
As hyperscale cloud service providers increase their investment in AI data centers, the share of data centers in global DRAM demand has risen to over 50%. SK Hynix's high-bandwidth memory (HBM) business has become a key indicator, with related chip suppliers' profits highly dependent on the capital expenditures of giants. Against the backdrop of stock price fluctuations of peers like Micron Technology (MU:US), the flow of funds and revaluation of sectors exhibit cross-market linkage characteristics.
Asian Trading Hours Provide First Liquidity Signal
Since Samsung Electronics typically releases performance guidance two weeks earlier than major US chip manufacturers, the Korean market has become a forward-looking window for assessing global AI hardware demand. During US stock market closures, the Korean stock memory sector becomes a leading indicator of market sentiment reassessment; meanwhile, the Nasdaq Index's movements during trading hours also preview the risk preferences of the Asian market for the next trading day. Previously, SK Hynix's sharp 15% drop dragged down the index, directly reflecting the transmission of global supply chain risks.
Asset Risk Homogenization and Divergence Expectations
When US and Korean tech stocks are dominated by the same macro factors, a slowdown in cloud service providers' capital expenditures may trigger cross-market valuation adjustments, increasing the volatility risk of leveraged funds. If future policy support, capital expenditure plans, or product structures diverge, the trends of companies like Samsung Electronics and Micron Technology may decouple. Under current conditions, if core AI computing power demand remains strong, the synchronous linkage of the two markets will remain high.
