房屋建设板块9月19日跌0.72%，上海建工领跌，主力资金净流出8.33亿元

Core Viewpoint - The housing construction sector experienced a decline of 0.72% on September 19, with Shanghai Construction leading the drop. The Shanghai Composite Index closed at 3820.09, down 0.3%, while the Shenzhen Component Index closed at 13070.86, down 0.04% [1][2]. Group 1: Market Performance - The housing construction sector's main stocks saw a decline, with Shanghai Construction being the worst performer [1]. - The Shanghai Composite Index and Shenzhen Component Index both recorded slight decreases on the same day [1]. Group 2: Capital Flow - The housing construction sector experienced a net outflow of 833 million yuan from main funds, while speculative funds saw a net inflow of 158 million yuan, and retail investors contributed a net inflow of 675 million yuan [2].