小家电板块12月18日跌1.01%，科沃斯领跌，主力资金净流出4066.64万元

Group 1 - The small home appliance sector experienced a decline of 1.01% on December 18, with Ecovacs leading the drop [1][2] - The Shanghai Composite Index closed at 3876.37, up 0.16%, while the Shenzhen Component Index closed at 13053.98, down 1.29% [1] - Key stocks in the small home appliance sector showed varied performance, with Beiyikang rising by 5.73% to a closing price of 36.90, while Ecovacs fell by 3.33% to 77.82 [1][2] Group 2 - The small home appliance sector saw a net outflow of 40.67 million yuan from institutional investors, while retail investors had a net inflow of 8.83 million yuan [2][3] - Among individual stocks, Beiyikang had a significant net inflow of 21.36 million yuan from institutional investors, while Suo Boer experienced a net outflow of 0.51 million yuan [3] - The trading volume and turnover for key stocks varied, with Beiyikang achieving a turnover of 148 million yuan and Ecovacs recording a turnover of 426 million yuan [1][2]