Taipei: The Taiwan Stock Exchange's main index opened with a rise of 79.71 points at 41,447.92 on Friday. The turnover at the opening was NT$12.78 billion, which is approximately US$401.35 million. According to Focus Taiwan, this upward movement in the index reflects a positive start for the stock exchange. Investors' activities contributed to the turnover, indicating a robust trading session at the beginning of the day.