Hong Kong Stock Market Movers | Optical fiber concept stocks lead declines; Hengtong Optic-Electric's RMB 6.6 billion private placement to boost optical communications raises market concerns over capacity glut from expansion wave.

Zhitong Finance APP has learned that optical fiber concept stocks are among the biggest decliners. As of press time, YOFC (06869.HK) fell 11.37% to HK$165.3; Trigiant Group (01300.HK) fell 8.84% to HK$3.145; Time Interconnect Technology (01729.HK) fell 3.41% to HK$16.73.