KOSPI, the Korea Composite Stock Price Index, recently experienced a rare single-day surge of about 5%, even triggering a program buy halt mechanism during the session, staging a classic V-shaped reversal.

There are three main direct catalysts:

First, U.S. memory chip giant Micron delivered strong earnings and issued optimistic AI demand guidance, reigniting expectations for a global memory super cycle. Second, SK Hynix is reportedly planning to list ADRs on Nasdaq to raise up to approximately $29 billion; if the funds flow back to South Korea, it would benefit both domestic expansion and the Korean won exchange rate. Third, market rumors suggest that the Korean government intends to use about 5 trillion won from semiconductor tax revenues to support domestic AI large models and purchase NVIDIA's high-end GPUs, with policy backing strengthening bullish sentiment.

In terms of market structure, Samsung Electronics and SK Hynix, the two heavyweight stocks, together now account for nearly 60% of KOSPI's market cap. This rally was driven by a surge in both stocks—Samsung rose nearly 5%~9%, and SK Hynix rose over 7%~13%. A few leading chip stocks dominated the vast majority of the index's gains, with domestic institutions and retail investors covering positions to fuel the rebound.

Market interpretation: This sharp rally is more of a "sentiment repair + narrow-based short squeeze" following the previous AI panic sell-off, rather than a sign of broad economic recovery. South Korean stocks are highly dependent on the health of HBM and enterprise DRAM. If the AI capital expenditure expectations of major U.S. tech companies cool or memory prices weaken in the future, the risk of reverse volatility due to excessive concentration cannot be ignored. In the short term, AI memory demand resilience and policy support still underpin the bullish narrative, but chasing highs requires caution against sharp fluctuations.