黑牡丹股价下跌3.63% 盘中振幅达7.52%

Group 1 - The core point of the article highlights the stock performance of Heimu Dan on August 21, where it closed at 7.43 yuan, down 0.28 yuan from the previous trading day, with a trading volume of 510,799 hands and a transaction amount of 388 million yuan [1] - The company operates in the real estate development sector, primarily in the Jiangsu region, and also engages in venture capital and bank equity participation [1] - On August 21, the stock experienced significant volatility, with a rapid decline of over 2% within 5 minutes at 9:36 AM, followed by a rebound of over 2% within 5 minutes at 9:47 AM, indicating a highly fluctuating stock price for the day [1] Group 2 - On August 21, the net outflow of main funds was 20.51 million yuan, accounting for 0.27% of the circulating market value, while over the past five days, there has been a net inflow of 120.46 million yuan, representing 1.57% of the circulating market value [1]