装修建材板块12月9日跌1.39%，北新建材领跌，主力资金净流出2.38亿元

Core Viewpoint - The renovation and building materials sector experienced a decline of 1.39% on December 9, with Beixin Building Materials leading the drop [1] Group 1: Market Performance - On December 9, the Shanghai Composite Index closed at 3909.52, down 0.37% [1] - The Shenzhen Component Index closed at 13277.36, down 0.39% [1] Group 2: Capital Flow - The renovation and building materials sector saw a net outflow of 238 million yuan from main funds, while speculative funds had a net inflow of 149 million yuan [2] - Retail investors contributed a net inflow of 8.976 million yuan to the sector [2]