北京时间2月21日晚美股开盘，三大指数开盘涨跌不一，截至发稿前，道指跌0.87%，纳指跌0.25%，标普500指数跌0.38%。 大型科技股多数下跌，亚马逊跌超1%，特斯拉、微软、英伟达、谷歌、苹果微跌，Meta上涨0.81%。 AI概念股涨跌不一。超微电脑盘初涨近5.3%后回吐多数涨幅，Palantir一度涨超2.6%，BullFrog AI一度跌超4%，CrowdStrike一度跌超...
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