商用车板块12月29日跌0.33%，中集车辆领跌，主力资金净流出1.85亿元

Group 1 - The commercial vehicle sector experienced a decline of 0.33% on December 29, with CIMC Vehicles leading the drop [1] - The Shanghai Composite Index closed at 3965.28, up 0.04%, while the Shenzhen Component Index closed at 13537.1, down 0.49% [1] - Key stocks in the commercial vehicle sector showed varied performance, with Jianghuai Automobile up 1.06% and CIMC Vehicles down 3.09% [2] Group 2 - The net outflow of main funds in the commercial vehicle sector was 185 million yuan, while retail investors saw a net inflow of 179 million yuan [2] - The trading volume for Jianghuai Automobile was 481,400 shares, with a transaction value of 2.399 billion yuan [1] - The stock performance of major companies included a 1.06% increase for Jianghuai Automobile and a 3.09% decrease for CIMC Vehicles [2][3]