In early trading on the 16th, optical communication stocks, including Taihan Fiberoptics, were weak. After a steep rise over the past month, investors appeared to be taking profits on the day.
As of 9:18 a.m. on the day, Taihan Fiberoptics was trading at 18,370 won, down 1,430 won (7.22%) from the previous session. Taihan Fiberoptics has surged more than 172% over the past month (Mar. 16–Apr. 15).
At the same time, Vissem Electronics (down 6.77%) and TMC (down 7.09%) were also weak. However, Lightron Fiber-Optic Devices alone was soaring 18.94%.
Earlier, when Jensen Huang, Nvidia chief executive officer (CEO), singled out optical communication as a next-generation key technology to ease artificial intelligence (AI) bottlenecks at GTC 2026 on the 17th (local time), share prices surged.
Optical communication is a technology that transmits data using light instead of electricity. Compared with copper cables that connect data, it consumes less power and is advantageous for long-distance transmission, making it a key infrastructure for expanding AI data centers.
Meanwhile, WOORIRO was under a trading halt on the day. The move followed a surge in its share price after it was designated an investment-risk stock. WOORIRO jumped 756% over the month.