美股开盘，道指跌0.88%，标普500指数跌1.26%，纳指跌1.92%。明星科技股多数低开，博通跌超5%，英伟达跌超3%，特斯拉跌超2%。京东涨超0.5%，公司Q4营收同比增长13.4%，将在未来36个月内回购最多50亿美元股票。迈威尔科技大跌18%，首财季营收指引逊于华尔街最高预期。 海量资讯、精准解读，尽在新浪财经APP
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