South Korea's KOSPI Index Breaks 9,000-Point Barrier for First Time

South Korea's KOSPI index closed at 9,063 points on Thursday, breaking the 9,000-point barrier for the first time in history ^[1].

The milestone marks a historic peak for the Seoul Stock Exchange, though the gain was driven by a narrow group of semiconductor giants rather than broad market growth.

The rally was fueled primarily by SK Hynix and Samsung Electronics, both of which reached all-time highs ^[2]. This surge occurred despite a hawkish decision from the U.S. Federal Open Market Committee (FOMC), which typically puts downward pressure on equity markets ^[3]. Earlier in the session, the index saw a 0.23% rise to 8,884 points before accelerating toward the record close ^[4].

However, the breadth of the rally remained weak. Data showed that more than seven times as many stocks fell as rose on the KOSPI ^[1]. This disparity suggests that the index's record height is heavily reliant on the performance of the country's largest chipmakers, a trend that has raised concerns about market concentration.

Volatility was more pronounced in the KOSDAQ, the market for small and medium-sized enterprises. The KOSDAQ fell 3.01% by the end of the day ^[1]. During trading, the index briefly slipped below 1,000 points, highlighting a vulnerability in smaller-cap stocks that contrasts sharply with the KOSPI's record ^[5].

Analysts said that while the 9,000-point milestone is a psychological victory, the underlying weakness in the broader market may trigger continued sell-off concerns ^[3]. The gap between the performance of semiconductor leaders and the rest of the market remains a primary point of instability.