5月14日，美股三大指数集体上涨，截至发稿，道指涨0.23%，纳指涨0.55%，标普500指数涨0.29%。美股AI概念股走高，超威半导体涨超8%，此前宣布60亿美元的回购计划；超微电脑大涨超15%，公司与DataVolt达成200亿美元合作协议。全球要闻美国调整对华加征关税记者14日从商务部获悉，根据美国白宫5月12日发布的《修改对等关税税率以反映与中华人民共和国会谈情况的行政令》，美方已于美东...
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