中证2000ETF（563300）开盘跌0.64%，重仓股鼎通科技跌3.14%，骄成超声跌2.83%

Group 1 - The China Securities 2000 ETF (563300) opened down 0.64% at 1.545 yuan on February 27 [1] - Major holdings in the ETF include Ding Tong Technology down 3.14%, Jiao Cheng Ultrasonic down 2.83%, and Pingtan Development down 2.08% [1] - The ETF's performance benchmark is the China Securities 2000 Index return, managed by Huatai-PB Fund Management Co., with a return of 55.21% since its establishment on September 6, 2023, and a 2.28% return over the past month [1]