The KOSPI has once again reached an all-time high, driven by a rally in major semiconductor stocks, particularly Samsung Electronics and SK Hynix, as the index approaches the 7,900 mark. However, the surge is concentrated on these two large-cap semiconductor companies, exacerbating the 'K-shaped' market phenomenon where performance varies significantly among different sectors.
On this day, the KOSPI closed at 7,822.24, marking a record high with an increase of 324.24 points (4.32%) from the previous trading day, which closed at 7,498.00. The index has surged over 54% since the end of March, when it stood at 5,052.46. Compared to the closing figure of 4,214.17 at the end of last year, the KOSPI has risen by 85.62% this year.
Market analysts are optimistic, with domestic brokerages suggesting that the KOSPI could surpass 8,000 and even reach 9,000. Foreign investment bank JP Morgan has projected that the index could exceed 10,000.
The recent upward trend is largely attributed to the semiconductor sector. On this day, Samsung Electronics and SK Hynix saw their shares rise by 6% and 13%, respectively, fueled by growing expectations for increased demand for AI semiconductors.
However, the concentration of gains in the semiconductor sector raises concerns. The recent rise in the domestic stock market has increasingly focused on Samsung Electronics and SK Hynix. On this day, the combined market capitalization of Samsung Electronics (including preferred shares), SK Hynix, and SK Square accounted for 52% of the KOSPI's total market cap.
Among the 34 KRX indices calculated by the Korea Exchange, all nine indices with the highest recent gains included Samsung Electronics and SK Hynix. The semiconductor index topped the list with a 22.98% increase, followed by the value-up index at 22.16%. The average increase for indices that included these two stocks was 19.45%, while the average for other indices without them was only 0.27%. This indicates a market where returns are heavily influenced by the inclusion of major semiconductor stocks.
The trend of concentration is also evident in trading volumes. The average daily trading volume of the KOSPI this month reached 48.4982 trillion won, a 64.1% increase from last month's 29.555 trillion won. In contrast, the average daily trading volume decreased from 947.18 million shares to 773.96 million shares, reflecting a decline in the number of traded stocks but a surge in trading volume for specific large-cap stocks.
So far this month, the average daily trading volume for Samsung Electronics and SK Hynix combined has reached 74.5353 trillion won, accounting for 37% of the total KOSPI trading volume. Including Samsung Electronics' preferred shares and SK Square, the combined share of these four stocks rises to 42%, up from 34.6% last month, indicating a deepening concentration trend.
Market experts believe there is still potential for further KOSPI gains. Analysts suggest that while the current concentration in the semiconductor sector may continue for some time, there is also a possibility that market momentum could gradually spread to other sectors.
Kim Jong-min, a researcher at Samsung Securities, noted in a recent report, "Behind the explosive rise lies extreme polarization in returns. In the future, we are likely to see a rotation of investments toward semiconductor materials, alternative energy, and physical AI beneficiaries." He added, "A gradual rotation following extreme concentration could serve as a stepping stone for the KOSPI's resurgence."
* This article has been translated by AI.
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