小金属板块7月31日跌3.67%，云南锗业领跌，主力资金净流出32.55亿元

Market Overview - The small metals sector experienced a decline of 3.67% on July 31, with Yunnan Zhiye leading the drop [1] - The Shanghai Composite Index closed at 3573.21, down 1.18%, while the Shenzhen Component Index closed at 11009.77, down 1.73% [1] Individual Stock Performance - Notable declines in individual stocks include: - Yunnan Cuprum (002428) down 6.54% with a closing price of 22.43 and a trading volume of 885,500 shares, totaling 2.037 billion yuan [2] - Zhongtung High-tech (000657) down 5.79% with a closing price of 16.11 and a trading volume of 1,658,800 shares, totaling 2.718 billion yuan [2] - Northern Rare Earth (600111) down 5.28% with a closing price of 37.50 and a trading volume of 2,790,700 shares, totaling 1.053 billion yuan [2] Capital Flow Analysis - The small metals sector saw a net outflow of 3.255 billion yuan from main funds, while retail investors contributed a net inflow of 2.993 billion yuan [2][3] - The capital flow for individual stocks indicates significant outflows for: - Anning Co. (002978) with a main fund outflow of 1.562 million yuan [3] - Western Materials (002149) with a main fund outflow of 4.979 million yuan [3] - Huayang New Materials (600281) with a main fund outflow of 20.239 million yuan [3]