KOSPI Index (KS11) · KOSDAQ Index (KQ11)
KOSPI Shatters 6,300 Milestone in Historic AI-Driven Rally
The South Korean stock market witnessed a historic day on February 26, 2026, as the benchmark KOSPI index soared past the 6,300-point mark for the first time in history. Driven by a massive surge in heavyweight semiconductor stocks and unyielding institutional buying, the index set a fresh closing high of 6,307.27, gaining 223.41 points or 3.67% from the previous session. This monumental breakthrough underscores South Korea’s pivotal role in the global AI hardware supply chain.
Market Summary: KOSPI and KOSDAQ Closing Data
The rally was not limited to the main bourse, as the tech-heavy KOSDAQ also enjoyed substantial gains, reflecting broad-based investor confidence in the technology sector.
| Index | Closing Value | Change (Points) | Change (%) |
|---|---|---|---|
| KOSPI | 6,307.27 | +223.41 | +3.67% |
| KOSDAQ | 1,165.00 | +32.18 | +2.84% |
Semiconductor Giants Lead the Charge
The primary engine behind today’s record-breaking performance was the “Big Two” of the Korean semiconductor industry. Samsung Electronics and SK Hynix saw their combined market capitalization surpass 2,000 trillion won as investors scrambled to secure positions ahead of the next phase of HBM4 mass production. Samsung Electronics (005930) closed at a staggering 218,000 won, up 7.13%, while SK Hynix continued its bull run, reaching new heights on the back of NVIDIA’s sustained demand.
Analysts attribute this surge to the “triple crown” of positive catalysts: better-than-expected earnings guidance from global AI leaders, breakthroughs in next-generation memory bandwidth, and the South Korean government’s continued “Corporate Value-up” initiatives which have improved market transparency and shareholder returns.
Investor Flows and Key Movers
While foreign investors engaged in tactical profit-taking earlier in the week, today saw a return of institutional and domestic retail support. Institutional investors were net buyers, injecting over 1.2 trillion won into the market, focusing heavily on large-cap tech and automotive stocks. In contrast, foreign investors showed a mixed pattern, with net selling in some sectors offset by high-conviction buying in AI-related infrastructure.
Top Gainers (KOSPI 200):
- Samsung Electronics (005930): +7.13% (Closing: 218,000 KRW)
- SK Hynix (000660): +5.82%
- Hanmi Semiconductor (042700): +4.55%
- Hyundai Motor (005380): +2.10%
Sector Outlook: The AI Super-Cycle Continues
The breach of the 6,300 level is viewed by many as the beginning of a new era for the Korean capital market. As we highlighted in our morning report, the integration of HBM4 into global AI clusters is creating a long-term demand floor that was previously unseen in the cyclical chip industry. Furthermore, the spillover effect is now visible in the KOSDAQ market, where secondary battery materials and AI software providers are also seeing renewed interest.
As the KOSPI looks toward the 6,500 level, investors should remain mindful of potential volatility stemming from global macro factors and currency fluctuations. However, the fundamental strength of Korea’s tech exports remains the strongest pillar of the current bull market.
Data Source: KRX (Korea Exchange), Yonhap News, Investing.com.
Disclaimer: The information provided in this report is for informational purposes only and does not constitute investment advice. Stock investments carry risks, including the potential loss of principal. Investors should conduct their own research or consult with a qualified financial advisor before making any investment decisions.