医药商业板块12月16日跌1.05%，瑞康医药领跌，主力资金净流出3.86亿元

Core Viewpoint - The pharmaceutical commercial sector experienced a decline of 1.05% on December 16, with Ruikang Pharmaceutical leading the drop [1] Group 1: Market Performance - On the same day, the Shanghai Composite Index closed at 3824.81, down 1.11% [1] - The Shenzhen Component Index closed at 12914.67, down 1.51% [1] Group 2: Capital Flow - The pharmaceutical commercial sector saw a net outflow of 386 million yuan from main funds, while speculative funds had a net inflow of 157 million yuan [2] - Retail investors contributed a net inflow of 229 million yuan to the sector [2]