汽车零部件板块12月18日跌0.24%，华懋科技领跌，主力资金净流出2.87亿元

Group 1 - The automotive parts sector experienced a decline of 0.24% compared to the previous trading day, with Huamao Technology leading the drop [1] - On the same day, 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] - A detailed table of individual stock performance within the automotive parts sector is provided [1] Group 2 - In terms of capital flow, the automotive parts sector saw a net outflow of 287 million yuan from main funds, while speculative funds experienced a net outflow of 476 million yuan [2] - Retail investors contributed a net inflow of 763 million yuan into the automotive parts sector [2] - A detailed table of capital flow for individual stocks within the automotive parts sector is provided [2]