养殖业板块1月20日跌0.45%，罗牛山领跌，主力资金净流出2.67亿元

Group 1 - The livestock sector experienced a decline of 0.45% on January 20, with Luo Niushan leading the drop [1] - The Shanghai Composite Index closed at 4113.65, down 0.01%, while the Shenzhen Component Index closed at 14155.63, down 0.97% [1] - Key stocks in the livestock sector showed varied performance, with Jingji Zhino rising by 10.01% to a closing price of 16.82, while Luo Niushan fell by 2.94% to 7.91 [1][2] Group 2 - The livestock sector saw a net outflow of 267 million yuan from main funds, while retail investors contributed a net inflow of 231 million yuan [2] - The trading volume for Jingji Zhino was 174,200 hands with a transaction value of 285 million yuan, indicating strong interest despite the overall sector decline [1][2] - The main fund inflow for Jingji Zhino was 68 million yuan, representing 23.84% of its trading volume, while retail investors showed a net outflow of 41 million yuan [3]