KOSPI Edges Lower as KOSDAQ Jumps 8%, Led by Batteries and Biotech
Korea’s stock market split sharply on the 29th. The KOSPI rose above 8,500 intraday but ended slightly lower near 8,300. The KOSDAQ, pressured for days, rebounded more than 8% to the 920 range as secondary battery, biotech and power shares attracted strong buying.

Korea’s equity market delivered a split session on the 29th, with the KOSPI pausing while the KOSDAQ staged a forceful rebound. The KOSPI briefly moved above the 8,500 line as buyers returned to large caps, but late profit-taking pushed the index back to the 8,300 range for a slight decline. The KOSDAQ, which had been under persistent pressure, closed near 920 with a gain of more than 8%, led by secondary battery, biotech and power-related stocks.
KOSPI Loses Momentum After Intraday High
The KOSPI opened with a stronger risk appetite and expanded its upper range during the session. The move above 8,500 reflected bargain hunting in major shares and selective rotation into key sectors. Still, selling pressure appeared as the short-term rally burden increased, and the index gave back its gains before the close.
For Korean investors, the wider volatility in won-denominated equities is the key point. The failure to hold the intraday breakout shows that earnings expectations and valuation pressure are working at the same time. Flows from foreign investors, institutions and pension funds are likely to shape the next trading session.
KOSDAQ Rebounds on Growth Stocks
The KOSDAQ was the center of the market. After repeated declines, it finished near 920 with an 8%-plus jump. Secondary battery shares were supported by expectations for electric vehicle and energy storage demand, biotech gained on bargain buying and drug-development hopes, and power stocks benefited from expectations for grid investment and rising AI data-center electricity demand.
The rally matters because the KOSDAQ has a high share of retail participation. For growth-stock investors, the move offered a short-term recovery signal. But an 8% daily gain also means volatility has expanded. Investors need to track trading value, earnings visibility and whether sector inflows continue.
Outlook Depends on Earnings and Flows
The session highlighted the contrast between the KOSPI and KOSDAQ. The KOSPI confirmed pressure around large-cap valuations, while the KOSDAQ quickly recovered from oversold conditions. The next focus is whether the KOSDAQ can hold the 920 line and whether the KOSPI can attempt another move above 8,500. Sustained buying in battery, biotech and power stocks would support sentiment, while renewed weakness below 8,300 in the KOSPI could pressure the broader market.
Key points
- Korea’s stock market split sharply on the 29th. The KOSPI rose above 8,500 intraday but ended slightly lower near 8,300. The KOSDAQ, pressured for days, rebounded more than 8% to the 920 range as secondary battery, biotech and power shares attracted strong buying.
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FAQ
How did the KOSPI close on the 29th?
The KOSPI briefly topped 8,500 but gave back gains and closed slightly lower near the 8,300 range.
Why did the KOSDAQ surge?
The KOSDAQ rebounded on bargain buying and strong gains in secondary battery, biotech and power-related stocks.
What should investors watch next?
Key points are whether the KOSDAQ holds 920, whether the KOSPI retests 8,500, and whether foreign and institutional flows continue.
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