On June 29, the announcement of semiconductor investment plans by Samsung Electronics and SK Hynix led to declines in the stock prices of major semiconductor firms and some regional thematic stocks. In contrast, shares in infrastructure-related sectors, such as energy and construction, showed strong performance. The KOSDAQ index also rebounded, particularly among bio and semiconductor component stocks.
According to the Korea Exchange, the KOSPI index closed at 8394.65, down 16.56 points (0.2%) from the previous trading day. Concerns over a slowdown in AI investments from the U.S. and escalating geopolitical tensions in the Middle East contributed to the decline. However, after the investment announcements by Samsung and SK Hynix in the afternoon, the market managed to recover some losses. Foreign investors sold a net 7.7332 trillion won worth of stocks.
Samsung Electronics, which unveiled its large-scale investment plan, saw its stock drop by 4.86%. SK Hynix and SK, which also announced significant investments in semiconductor fabrication plants, fell by 3.68% and 1.68%, respectively.
Stocks that had surged as 'Honam-related' without confirmed business relevance also reversed course. Bohae Brewery, which had seen three upper limits this month due to expectations surrounding its factory in Jeongseong, plummeted by 16.90% as selling pressure mounted. Hyundai Motor, despite announcing a 9 trillion won investment in Saemangeum, only managed a 3.43% increase, while Hanwha Aerospace, related to the Yeongnam region, saw a slight rise of 0.89%.
Conversely, stocks in the energy and civil engineering sectors, which have tangible business connections, surged following the government's commitment to extensive infrastructure support. Namhwa Construction, a mid-sized construction firm based in Gwangju and Jeonnam, recorded an upper limit of 29.94% for the third consecutive trading day, reflecting expectations from the establishment of the second semiconductor cluster in Honam. Namhwa Industry, which operates Muan CC, also closed at the upper limit of 30.00%.
LS Electric, a key player in high-voltage transformer production essential for nationwide data center highways, broke a five-day losing streak with a 10.34% surge. HD Hyundai Electric also saw gains of 6.12%. GS, buoyed by expectations for data center construction near Dangjin in Chungnam and Donghae in Gangwon, rose by 7.68%. Doosan Enerbility, which had a vice chairman present at a national briefing, jumped 8.51% due to expectations of benefiting from large-scale power infrastructure projects. Other beneficiaries, including Doosan Robotics (up 7.76%) and Seaham Machinery Industry (up 7.91%), also closed higher.
While the KOSPI faltered, the KOSDAQ index experienced a notable increase. The KOSDAQ closed at 920.57, up 69.20 points (8.13%), marking its largest gain since March 5 (14.10%). Most of the top market cap stocks on the KOSDAQ, including those in the bio sector, surged. Rigakem Bio rose by 14%, while Alteogen increased by 8.59%. Other notable gainers included EcoPro (23.69%), ABL Bio (20.18%), and EcoPro BM (15.56%).
* This article has been translated by AI.
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