A股三大指数转跌！微盘股指数跌超3%，旅游、房地产、数字货币、软件开发领跌，沪深京三市下跌个股超4800只

Group 1 - The micro-cap stock index has dropped over 3%, indicating a significant decline in the market [1] - Sectors such as tourism, real estate, digital currency, and software development experienced the largest declines [1] - More than 4,800 stocks in the Shanghai, Shenzhen, and Beijing markets have fallen [1]