The Korea Exchange's investment warnings on soaring stocks have yielded mixed results in stock performance. Some stocks designated as investment warnings last month have seen a cooling off in their rapid price increases, while others have continued to rise, supported by new themes and demand.
According to the Korea Exchange on September 15, several stocks, including Hyulim Robot, RF Materials, Bit & Electronics, Woori Technology, Wonik Holdings, Daehan Optical Communication, Newen AI, Samji Electronics, LK Samyang, and OIS Solutions, were designated as investment warning stocks due to their rapid price increases last month.
Comparing the closing prices of these stocks on the last trading day before the investment warning designation and on September 15 reveals a significant divergence in stock performance. While some stocks have given back a substantial portion of their gains, others have continued to rise even after the warning was issued.
Hyulim Robot was designated as an investment warning stock on August 14. Its closing price on August 13 was 7,720 won, but it closed at 6,140 won on the warning day, marking a 20.5% decline. This indicates that it has given back a significant portion of its gains since the warning was issued.
In contrast, RF Materials has maintained its upward trajectory even after the investment warning was issued. Designated on August 5, RF Materials' price rose from 29,950 won on August 4 to 45,250 won on the warning day, a 51.1% increase.
Analysts attribute the stock price increase to rising demand for optical communication driven by expanded investments in AI data centers. Kim Aram, a senior researcher at Shinhan Investment Corp., describes RF Materials as essentially the only player in the domestic lumens value chain, forecasting that sales of lumens pump laser packages will increase from 3 to 4 billion won last year to over 30 billion won this year and 70 billion won next year.
Kim noted, "RF Materials has been the exclusive supplier of pump laser packages to Lumens since last year and has decided to expand its new factory at the request of clients, planning to start two-shift production from November to increase supply volume."
Bit & Electronics also saw its stock price rise after being designated as an investment warning. Designated on August 10, its price increased from 3,005 won on August 7 to 4,120 won on the warning day, a 37.1% rise. This increase is attributed to heightened expectations for optical communication demand due to expanded investments in AI data centers.
Investment warnings are a measure within the Korea Exchange's market alert system, one step above investment caution. Stocks designated as investment warnings require a 100% margin deposit for purchases and restrict purchases through margin trading. If a stock continues to surge after the warning, trading may be suspended or it may be designated as a high-risk investment.
A securities industry official stated, "The purpose of issuing an investment warning is not to induce a stock price decline but to alert investors to overheating stocks in the short term and to limit speculative demand such as margin trading. If new policies, industry themes, or individual positive news emerge after the warning, demand may return, so it is important to consider trading volume, supply and demand, and additional factors rather than viewing the warning itself as a signal for a price drop."
* This article has been translated by AI.
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