In the aftermarket of the Korea Exchange (KRX), battery stocks are showing strength while major semiconductor shares, including Samsung Electronics and SK Hynix, are experiencing weakness. The volatility control device (VI) has been triggered more frequently in the aftermarket compared to regular trading hours, drawing attention to volatility management.
As of 6 p.m. on September 15, Samsung Electronics traded at 248,500 won, down 500 won (0.20%) from the previous trading day. SK Hynix also fell by 9,000 won (0.53%) to 1,688,000 won. Samsung Electro-Mechanics decreased by 1.50%, and Samsung Biologics dropped by 0.56%.
In contrast, battery stocks showed positive performance. LG Energy Solution rose by 11,000 won (3.13%) to 362,500 won. On the KOSDAQ, EcoPro increased by 2.82% to 83,800 won, while EcoPro BM climbed 2.50% to 106,500 won.
Among the most actively traded stocks, several surged significantly. On the KOSDAQ, Korea Advanced Materials jumped 29.98% to 3,360 won, and Aton soared 29.84%. Other notable gainers included MeTooOn (25.08%), Samik Pharmaceutical (23.95%), and SFA Semiconductor (14.08%). On the KOSPI, S.M. Bexel rose by 18.30%.
The aftermarket has seen the VI triggered more frequently than during regular trading hours. According to the exchange, on its first trading day, the VI was activated a total of 1,112 times in the aftermarket, with 228 occurrences on the KOSPI and 884 on the KOSDAQ, approximately 2.8 times the total of 391 activations during regular trading.
The exchange explained that the liquidity in the aftermarket is about 7% of that in regular trading, and the same VI activation criteria were applied to ensure stable operations and volatility management in the early stages. On September 14, the trading volume was recorded at 25.7 trillion won for regular trading and 1.8 trillion won for the aftermarket.
However, actual price volatility was lower in the aftermarket compared to regular trading. The volatility for individual stocks on the KOSPI was 4.1% during regular hours and 2.9% in the aftermarket, while the KOSDAQ saw a decrease from 5.8% to 4.6%. The exchange noted that while some stocks experienced increased volatility, overall, prices were more stable than during regular trading.
* This article has been translated by AI.
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