城商行板块9月5日跌0.37%，重庆银行领跌，主力资金净流出2.87亿元

Group 1 - The city commercial bank sector experienced a decline of 0.37% on September 5, with Chongqing Bank leading the drop [1] - The Shanghai Composite Index closed at 3812.51, up 1.24%, while the Shenzhen Component Index closed at 12590.56, up 3.89% [1] - Key individual stock performances in the city commercial bank sector included Ningbo Bank rising by 1.74% and Chongqing Bank falling by 1.34% [1][2] Group 2 - The net outflow of main funds from the city commercial bank sector was 287 million yuan, while retail investors saw a net inflow of 141 million yuan [2] - The trading volume for Chongqing Bank was 107,400 shares, with a transaction amount of 103 million yuan [2] - The overall trading activity showed a mixed trend, with some banks experiencing slight declines while others saw minor gains [1][2]