金属新材料板块7月31日跌1.25%，屹通新材领跌，主力资金净流出6.3亿元

Market Overview - The metal new materials sector experienced a decline of 1.25% on July 31, with Yitong New Materials 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] Stock Performance - Jiangnan New Materials saw a significant increase of 10.01%, closing at 55.29, with a trading volume of 97,300 shares and a transaction value of 524 million [1] - Other notable performers included Huitong New Materials (+2.17%), and Boke New Materials (+1.83%) [1] - Conversely, Chitong New Materials experienced a decline of 7.14%, closing at 34.58, with a transaction value of 251 million [2] Capital Flow - The metal new materials sector had a net outflow of 630 million from major funds, while retail investors saw a net inflow of 619 million [2] - The table of capital flow indicates that Jiangnan New Materials had a major net inflow of 1.25 billion, while other stocks like Yuyuan Powder Materials and Sanlu Co. faced net outflows [3]