电机板块12月9日跌1.44%，华瑞股份领跌，主力资金净流出8.28亿元

Group 1 - The core viewpoint of the news is that the electric motor sector experienced a decline of 1.44% on the trading day, with Huari Co., Ltd. leading the losses [1] - The Shanghai Composite Index closed at 3909.52, down 0.37%, while the Shenzhen Component Index closed at 13277.36, down 0.39% [1] - The individual stock performance within the electric motor sector is detailed in a table, indicating varied movements among different companies [1] Group 2 - In terms of capital flow, the electric motor sector saw a net outflow of 828 million yuan from main funds, while speculative funds had a net inflow of 159 million yuan, and retail investors contributed a net inflow of 669 million yuan [2] - A table is provided that outlines the capital flow for individual stocks within the electric motor sector [2]