电机板块12月15日跌2.35%，兆威机电领跌，主力资金净流出6.81亿元

Core Viewpoint - The electric motor sector experienced a decline of 2.35% on the trading day, with Zhaowei Electric leading the drop [1] Group 1: Market Performance - The Shanghai Composite Index closed at 3867.92, down 0.55% [1] - The Shenzhen Component Index closed at 13112.09, down 1.1% [1] Group 2: Capital Flow - On the same day, the electric motor sector saw a net outflow of 681 million yuan from main funds, while retail investors contributed a net inflow of 678 million yuan [2] - Speculative funds recorded a net inflow of 3.2264 million yuan [2]