In the trading session on the 21st, optical communication-related stocks generally showed an upward trend, but price momentum varied significantly across individual stocks. TMC and RF Materials posted strong gains, while active trading was concentrated in Daehan Optical Communication. Meanwhile, Bitgwajeonza failed to escape weakness despite a sharp increase in trading volume.

■ TMC Posts Most Notable Rise Among Optical Communication Stocks TMC saw rapid inflows of buying pressure during the session, displaying a notable upward trend among optical communication-related stocks. After reaching intraday highs, some profit-taking emerged, but the stock maintained higher price levels. RF Materials and RFHIC also rose in tandem. As market interest in wireless communication and optical communication equipment continued, buying pressure spread to stocks supplying related components and materials.

■ Daehan Optical Communication Maintains Upward Zone Amid Concentrated Trading Daehan Optical Communication showed strength as trading became concentrated. The stock expanded its intraday gains before pulling back below its highs, but maintained its upward zone. With a significant increase in trading volume, it is analyzed to be in a range where both the possibility of further gains and short-term profit-taking volumes can be observed simultaneously. LS also joined the upward trend, and FiberPro, Sungho Electronics, Jaram Technology, Woorinet, Mercury, and Seoul Biosys also posted gains, indicating that buying pressure spread across the broader optical communication stock group.

■ Some Stocks Decline or Remain Flat However, not all related stocks moved in the same direction. Bitgwajeonza declined despite high trading volume and showed significant intraday price fluctuations. Lycom also recorded weakness, while Korea Advanced Materials showed limited movement without a clear price change.

■ Investment Considerations Stocks known for thematic appeal can see price movements that precede actual business performance. Rather than simply checking trading volume increases or short-term gains, investors need to examine whether optical communication businesses are translating into revenue and profits.

[This article is provided as reference material for investment decisions and does not recommend the purchase or sale of any specific stock. Investment responsibility lies with the investor. This article was written with AI assistance.]