Core Points - The aquaculture sector experienced a decline of 1.31% on October 30, with Tianyu Biology leading the drop [1] - The Shanghai Composite Index closed at 3986.9, down 0.73%, while the Shenzhen Component Index closed at 13532.13, down 1.16% [1] Stock Performance - Yisheng Co. (002458) closed at 9.03, up 0.33% with a trading volume of 97,800 shares and a turnover of 88.43 million yuan [1] - Xiantan Co. (002746) closed at 6.31, up 0.32% with a trading volume of 154,800 shares and a turnover of 97.81 million yuan [1] - Tianyu Biology (603717) closed at 8.73, down 3.64% with a trading volume of 155,200 shares and a turnover of 137 million yuan [2] - Huaying Agriculture (002321) closed at 2.77, down 3.15% with a trading volume of 424,400 shares and a turnover of 119 million yuan [2] Capital Flow - The aquaculture sector saw a net outflow of 188 million yuan from institutional investors, while retail investors had a net inflow of 141 million yuan [2] - The main capital inflow and outflow for specific stocks included: - Jingji Zhinnong (000048) had a net inflow of 19.99 million yuan from main capital [3] - Wens Foodstuff Group (300498) had a net inflow of 7.96 million yuan from main capital [3] - Yisheng Co. (002458) had a net inflow of 3.79 million yuan from main capital [3]