普钢板块8月28日跌0.13%，友发集团领跌，主力资金净流出7.22亿元

Group 1 - The core viewpoint indicates that the steel sector experienced a slight decline, with a 0.13% drop on August 28, led by Youfa Group [1] - The Shanghai Composite Index closed at 3843.6, reflecting a 1.14% increase, while the Shenzhen Component Index closed at 12571.37, showing a 2.25% increase [1] Group 2 - In terms of capital flow, the steel sector saw a net outflow of 722 million yuan from main funds, while retail investors contributed a net inflow of 379 million yuan [2] - Speculative funds recorded a net inflow of 343 million yuan into the steel sector on the same day [2]