Market Overview - The non-metal materials sector experienced a decline of 1.52% on July 31, with Tianma 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 - Tianma New Materials (code: 838971) closed at 34.31, down 4.30% with a trading volume of 36,400 shares and a transaction value of 128 million [2] - Other notable declines included: - Lianrui New Materials (code: 688300) down 4.06% to 58.20 with a trading volume of 101,000 shares and a transaction value of 599 million [2] - Bingyang Technology (code: 836675) down 3.35% to 12.42 with a trading volume of 16,300 shares and a transaction value of 2.06 million [2] - The only stock with a positive performance was Quartz Co. (code: 603688), which rose by 0.52% to 34.96 [1] Capital Flow - The non-metal materials sector saw a net inflow of 14.76 million from institutional investors, while retail investors experienced a net outflow of 23.18 million [2][3] - Key stocks with significant capital flow include: - Suotong Development (code: 603612) with a net inflow of 61.96 million from institutional investors [3] - Quartz Co. (code: 603688) with a net inflow of 15.38 million from institutional investors [3] - Lianrui New Materials (code: 688300) faced a net outflow of 45.14 million from institutional investors [3]