城商行板块12月18日涨2.3%，上海银行领涨，主力资金净流入1.18亿元

Group 1 - The core viewpoint of the news is that the city commercial bank sector experienced a rise of 2.3% on December 18, with Shanghai Bank leading the gains [1] - The Shanghai Composite Index closed at 3876.37, up by 0.16%, while the Shenzhen Component Index closed at 13053.98, down by 1.29% [1] - The individual stock performance within the city commercial bank sector is detailed in a table, indicating varied movements among the stocks [1] Group 2 - In terms of capital flow, the city commercial bank sector saw a net inflow of 118 million yuan from main funds, while retail funds experienced a net outflow of 215 million yuan [2] - Retail investors contributed a net inflow of 97.306 million yuan to the sector [2] - A table is provided that outlines the capital flow for individual stocks within the city commercial bank sector [2]