Group 1 - The feed sector experienced a slight decline of 0.08% on September 1, with Lude Environment leading the drop [1] - The Shanghai Composite Index closed at 3875.53, up 0.46%, while the Shenzhen Component Index closed at 12828.95, up 1.05% [1] - Major stocks in the feed sector showed varied performance, with Bangmu Technology leading with a 9.99% increase, closing at 26.43 [1] Group 2 - The feed sector saw a net inflow of 146 million yuan from institutional investors, while retail investors experienced a net outflow of 36.42 million yuan [1] - The trading volume for key stocks in the feed sector varied, with Aonong Biological recording a volume of 1.6445 million shares traded [1] - The total transaction value for Bangmu Technology reached 270 million yuan, indicating strong investor interest [1]