城商行板块12月17日跌0.22%，厦门银行领跌，主力资金净流入9622.45万元

Group 1 - The city commercial bank sector experienced a decline of 0.22% compared to the previous trading day, with Xiamen Bank leading the decline [1] - The Shanghai Composite Index closed at 3870.28, up by 1.19%, while the Shenzhen Component Index closed at 13224.51, up by 2.4% [1] - A table detailing the individual stock performance within the city commercial bank sector is provided [1] Group 2 - The net inflow of main funds into the city commercial bank sector was 96.2245 million yuan, while retail funds saw a net outflow of 5.9988 million yuan [2] - The table showing the fund flow for individual stocks in the city commercial bank sector is included [2]