特高压指数盘中涨2%，通光线缆涨超12%

Group 1 - The core point of the news is that the ultra-high voltage index experienced a 2% increase during trading on February 26 [1] - Among the constituent stocks, Tongguang Cable saw a rise of over 12% [1] - Zhongtian Technology, Hengtong Optic-Electric, and Hangdian Co. all reached their daily limit up [1] - Hancable shares increased by 3% [1]