Taipei: The Taiwan Stock Exchange's main index opened up 178.07 points at 27,480.44 Monday on turnover of NT$8.66 billion (US$282.59 million).According to Focus Taiwan, the stock market's positive opening signals a robust start, highlighting investor interest and market activity. The turnover, amounting to NT$8.66 billion, underscores the volume of trading taking place, reflecting the active participation of market players.