每经AI快讯，2月28日，美股三大指数开盘涨跌不一，道指涨0.05%，标普500指数跌0.08%，纳指跌0.36%。热门中概股多数下跌，小鹏汽车跌超7%，理想汽车、阿里巴巴跌逾4%，京东跌超3%。（文章来源：每日经济新闻）
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