The KOSDAQ index closed higher in the regular session on the 29th. After falling to the 833 level during the day, the index recovered its losses and turned upward, while top market-cap stocks showed mixed performance.

The KOSDAQ finished the day at 849.80, up 3.22 points (0.38%) from the previous trading day. The index opened at 843.87 and fell to as low as 833.62 before rebounding to an intraday high of 849.82, closing the regular session near that peak.

■ Semiconductor-led rally... Jusung Engineering and Wonik IPS surge more than 5%

Semiconductor-related stocks drew attention in the KOSDAQ market this day. Jusung Engineering and Wonik IPS both posted gains of more than 5%, standing out among the top market-cap stocks.

Jusung Engineering closed at 222,000 won, up 13,000 won (6.22%) from the previous session, while Wonik IPS finished at 130,300 won, up 7,100 won (5.76%). Eotech Corporation also joined the rally, rising 27,000 won (5.76%) to 495,500 won.

■ EcoPro group shares weaken together

In contrast, secondary battery-related stocks EcoPro and EcoPro BM both declined. EcoPro closed at 78,800 won, down 3,100 won (-3.79%) from the previous trading day, and EcoPro BM fell 5,200 won (-4.67%) to 106,100 won. Notably, EcoPro BM recorded the largest decline among the top 10 KOSDAQ stocks by market capitalization.

■ Biotech stocks mostly strong... Alteogen and HLB rise

Biotech-related stocks mostly trended higher. Alteogen closed at 253,500 won, up 1,000 won (0.40%) from the previous session, and RigaChem Bio finished at 73,500 won, up 2,300 won (3.23%).

HLB ended the regular session at 40,150 won, up 450 won (1.13%) from the previous trading day. HLB, which had closed limit-up in the regular session on the 28th, also surged in the morning that day, but gave back much of its intraday gain to close with a rise of around 1%. With volatility persisting for a second straight day, attention turned to the stock's movement on the 30th, the last trading day of September.

In addition, Rainbow Robotics closed at 416,500 won, down 5,000 won (-1.19%) from the previous session, while Simmtech finished at 152,200 won, up 5,000 won (3.40%).

■ 7 of top 10 stocks rise... Focus on whether the 850 level will be breached on the 30th

Of the KOSDAQ's top 10 stocks by market capitalization, seven rose and three fell. Despite weakness in EcoPro group shares, semiconductor-related stocks and some biotech names rose, allowing the index to close higher than the previous session.

Market attention is now turning to the 30th, the last trading day of September. Whether the KOSDAQ can attempt to break above the 850 level, based on the 849 level recovered this day, is a key point of interest. Whether semiconductor stocks such as Jusung Engineering and Wonik IPS can sustain their upward momentum, the possibility of a rebound in EcoPro and EcoPro BM, and the future share price movement of HLB, which closed higher after the previous day's limit-up, are also drawing attention.

However, caution is warranted for stocks that have shown large price swings over a short period.

[※ This article is for investment reference purposes only and does not recommend buying or selling. Investment decisions and the resulting responsibility rest with the investor.]