化学原料板块8月27日跌2.5%，振华股份领跌，主力资金净流出18.17亿元

Market Overview - The chemical raw materials sector experienced a decline of 2.5% on August 27, with Zhenhua Co., Ltd. leading the drop [1] - The Shanghai Composite Index closed at 3800.35, down 1.76%, while the Shenzhen Component Index closed at 12295.07, down 1.43% [1] Stock Performance - Notable stock performances included: - ST Yatai (000691) rose by 3.71% to a closing price of 7.55, with a trading volume of 183,200 shares and a turnover of 137 million yuan [1] - Zhenhua Co., Ltd. (603067) fell by 6.89% to a closing price of 17.85, with a trading volume of 413,100 shares and a turnover of 762 million yuan [2] - Other companies like Lushi Chemical (000830) remained unchanged, while Baofeng Energy (600989) and Jiangsu Suoying (600746) saw declines of 0.87% and 1.42%, respectively [1][2] Capital Flow - The chemical raw materials sector saw a net outflow of 1.817 billion yuan from major funds, while retail investors contributed a net inflow of 1.365 billion yuan [2]