Optical semiconductor and optical communication-related stocks showed a broad decline across the board in the market on the 16th, ahead of the Constitution Day holiday weekend. Daehan Optical Communication and RF Materials recorded double-digit decline rates, while selling pressure continued in telecommunications equipment stocks such as Jaram Technology, Woorinet, and Mercury.

■ Daehan Optical Communication Closes at Intraday Low... Trading Volume of 5.07 Million Shares On the 16th, Daehan Optical Communication finished trading at 10,300 won, down 1,380 won from the previous trading day. The decline rate was 11.82%. It opened at 11,150 won and attempted a rebound, rising to as high as 11,350 won during the session before turning downward. Ultimately, it closed at the intraday low of 10,300 won, indicating no clear recovery in buying interest. Trading volume reached 5,072,309 shares.

■ RF Materials Falls 12.21%... "Short-Term Supply and Demand Pressure" RF Materials, an optical semiconductor materials and components company, recorded a decline of 12.21%, finishing at 46,000 won. Both the opening price and the intraday high were 51,500 won, but the decline widened thereafter, closing at the intraday low. Given that selling volume continued without any attempted rebound, the short-term supply and demand burden was analyzed to be significant.

■ Seoul Biosys, RFHIC, Jaram Technology, and Others Also Weaken Seoul Biosys fell 9.38% to 5,800 won. After opening at 6,220 won, it dropped to as low as 5,690 won during the session. RFHIC, which conducts business related to wireless communication semiconductors and power amplifiers, also declined 8.98% to 46,600 won.

Jaram Technology traded at 20,750 won, down 7.57%. The intraday high was 22,350 won and the low was 20,400 won. Woorinet recorded 7,130 won, down 6.55%, while Mercury fell 6.47% to 3,250 won.

■ Weakness Persists in Optical Fiber and Optical Communication Component Stocks Stocks related to optical fiber and optical communication components were also unable to avoid the decline. Lycom fell 5.04% to 4,055 won, and FiberPro traded down 3.98% at 11,820 won. TMC stood at 12,030 won, down 2.98%.

Light & Electron recorded a decline of 8.32%, finishing at 2,590 won. Notably, its trading volume reached 22,698,173 shares, making it the most actively traded stock among the related stocks. It rose to 3,010 won intraday but later fell to as low as 2,565 won, significantly widening its volatility.

[※ This is an AI-assisted article. The information provided in this article is intended for general informational purposes and does not constitute financial advice. Volatility is extremely high, and any losses are your own responsibility. Please ensure careful consideration and seek professional advice before making any decisions. This publication assumes no legal or financial responsibility for the information provided.]