工程机械板块12月18日跌1.03%，建设机械领跌，主力资金净流出6654.89万元

Core Viewpoint - The engineering machinery sector experienced a decline of 1.03% on December 18, with construction machinery leading the drop, while the overall market showed mixed results with the Shanghai Composite Index rising by 0.16% and the Shenzhen Component Index falling by 1.29% [1][2] Group 1: Market Performance - The engineering machinery sector fell by 1.03% on the trading day [1] - The Shanghai Composite Index closed at 3876.37, up by 0.16% [1] - The Shenzhen Component Index closed at 13053.98, down by 1.29% [1] Group 2: Capital Flow - The engineering machinery sector saw a net outflow of main funds amounting to 66.54 million yuan [2] - Retail investors contributed a net inflow of 92.08 million yuan [2] - Speculative funds experienced a net outflow of 25.53 million yuan [2]