KOSPI Surges 5.12% to Record High of 6936.99 on May 4

Historic Rally Pushes Index Near 7000 Milestone

South Korea's benchmark KOSPI index delivered a stunning performance on May 4, 2026, surging 338.12 points or 5.12% to close at an all-time high of 6,936.99. This marked the first time the index surpassed the 6,900 level, leaving it just 63.01 points shy of the psychologically significant 7,000 mark. The rally was fueled primarily by a blockbuster performance in the semiconductor sector amid robust foreign investor buying.

According to data from the Yahoo Finance KOSPI historical data, the index opened at 6,782.93, hit an intraday high of 6,937.00, and dipped to a low of 6,741.63 before recovering to its record close. Trading volume was brisk at over 864 million shares, reflecting heightened market enthusiasm.

Semiconductor Stocks Lead the Charge

The semiconductor-heavy index was propelled by standout gains from key players. SK Hynix, a global leader in memory chips, soared over 12%, pushing its market capitalization above 1,000 trillion KRW for the first time ever. Samsung Electronics also advanced approximately 5.44%, contributing significantly to the index's upward momentum. These gains outweighed broader geopolitical tensions, as noted in reports from The Korea Times.

• SK Hynix: +12.52% (record intraday high)
• Samsung Electronics: +5.44%
• Broader chip sector rally amid AI and tech demand

Investor Activity Breakdown

Foreign investors posted record net purchases, snapping up shares aggressively. Institutions also joined the buying spree, while individual investors engaged in strategic selling in semiconductors worth around 4.8 trillion KRW. This dynamic underscores a shift toward professional money driving the bull run.

Underlying Drivers of the Surge

Several factors converged to ignite this explosive move:

• AI and Chip Supercycle: Continued demand for high-bandwidth memory (HBM) chips propelled SK Hynix and peers.
• Policy Tailwinds: South Korea's value-up program and corporate reforms have eroded the 'Korea discount,' attracting global capital.
• Global Momentum: Alignment with U.S. tech rally, where S&P 500 and Nasdaq neared records.
• Technical Breakout: Post-holiday reopen after Labor Day, breaking key resistance levels.

As per Trading Economics, the KOSPI has risen over 29% in the past month and nearly 68% in six months, making it one of the world's top-performing indices in 2026.

Outlook and Risks Ahead

Analysts are optimistic, with some major firms like Morgan Stanley raising year-end targets toward 7,500. The index's proximity to 7,000 could trigger further FOMO buying. However, risks include potential volatility from U.S. Fed policy shifts, escalating geopolitical issues, and profit-taking after the sharp run-up.

The KOSPI Volatility Index also surged, signaling heightened uncertainty despite the gains. On May 5, pre-market futures suggest cautious optimism as investors eye U.S. earnings and economic data.

Conclusion

The May 4 surge cements South Korea's stock market resurgence, transforming it from laggard to leader. With semiconductors at the forefront and supportive fundamentals, the path to 7,000 and beyond appears clear, though prudent risk management remains essential.