非金属材料板块8月12日跌0.76%，索通发展领跌，主力资金净流出1.23亿元

Market Overview - The non-metal materials sector experienced a decline of 0.76% on August 12, with Suotong Development leading the drop [1] - The Shanghai Composite Index closed at 3665.92, up 0.5%, while the Shenzhen Component Index closed at 11351.63, up 0.53% [1] Stock Performance - Key stocks in the non-metal materials sector showed varied performance, with the following notable changes: - Suotong Development (603612) closed at 23.25, down 3.49% with a trading volume of 352,900 shares and a turnover of 849 million yuan [2] - Quartz Co. (603688) closed at 34.74, up 0.43% with a trading volume of 102,900 shares and a turnover of 355 million yuan [1] - Long High Co. (605086) closed at 28.44, down 0.73% with a trading volume of 28,500 shares and a turnover of 80.41 million yuan [2] Capital Flow - The non-metal materials sector saw a net outflow of 123 million yuan from institutional investors, while retail investors experienced a net inflow of 62.79 million yuan [2][3] - Notable capital flows included: - Long High Co. had a net outflow of 12.35 million yuan from institutional investors, but a net inflow of 10.22 million yuan from retail investors [3] - Suotong Development faced a significant net outflow of 84.36 million yuan from institutional investors, with retail investors contributing a net inflow of 49.50 million yuan [3]