商用车板块12月1日涨1.24%，宇通客车领涨，主力资金净流出1.55亿元

Group 1 - The commercial vehicle sector increased by 1.24% on December 1, with Yutong Bus leading the gains [1] - The Shanghai Composite Index closed at 3914.01, up 0.65%, while the Shenzhen Component Index closed at 13146.72, up 1.25% [1] - Key stocks in the commercial vehicle sector showed varied performance, with Yutong Bus closing at 32.00, up 2.86%, and Jianghuai Automobile at 49.86, up 1.76% [1] Group 2 - The commercial vehicle sector experienced a net outflow of 155 million yuan from institutional investors, while retail investors saw a net inflow of 198 million yuan [3][4] - Specific stock performances included China National Heavy Duty Truck with a net outflow of 42.35 million yuan and a retail inflow of 26.78 million yuan [4] - The trading volume for Yutong Bus was 163,800 shares, with a transaction value of 518 million yuan [1]