Taipei: The Taiwan Stock Exchange's main index saw a decline as it opened 57.36 points lower, standing at 21,786.33. The turnover for the session was reported at NT$4.79 billion, equivalent to US$158.82 million.According to Focus Taiwan, this opening reflects a downward trend in the market, as investors and traders navigate the current financial landscape. The turnover figures indicate the level of trading activity at the start of the week, providing insights into market sentiment.