房地产开发板块12月12日跌0.3%，广宇集团领跌，主力资金净流出7059.56万元

Group 1 - The real estate development sector experienced a decline of 0.3% compared to the previous trading day, with Guangyu Group leading the drop [1] - The Shanghai Composite Index closed at 3889.35, reflecting an increase of 0.41%, while the Shenzhen Component Index closed at 13258.33, showing an increase of 0.84% [1] - A detailed table of individual stock performance within the real estate development sector is provided [1] Group 2 - In terms of capital flow, the real estate development sector saw a net outflow of 70.5956 million yuan from main funds, while retail investors contributed a net inflow of 380 million yuan [2] - The sector experienced a net outflow of 309 million yuan from speculative funds [2] - A detailed table of capital flow for individual stocks in the real estate development sector is included [2]