热门中概股收盘涨跌不一，纳斯达克中国金龙指数跌0.28%。

Group 1 - The core viewpoint of the article indicates that popular Chinese concept stocks experienced mixed performance, with the Nasdaq Golden Dragon China Index declining by 0.28% [1] Group 2 - The article highlights the volatility in the performance of Chinese stocks listed in the U.S. markets, reflecting broader market trends and investor sentiment [1] - The decline in the Nasdaq Golden Dragon China Index suggests potential challenges facing these companies amid fluctuating market conditions [1]