武商集团盘初跌近5%，此前股东达孜银泰拟减持3%股份。

Group 1 - The core point of the article is that Wushang Group's stock dropped nearly 5% at the beginning of trading due to a shareholder, Dazi Yintai, planning to reduce its stake by 3% [1] Group 2 - The reduction in stake by Dazi Yintai indicates potential changes in shareholder confidence or strategy regarding Wushang Group [1] - The market reaction, reflected in the nearly 5% drop, suggests that investors are closely monitoring shareholder actions and their implications for the company's future performance [1]