每经AI快讯,7月28日,美股三大指数开盘涨跌不一,道指涨0.77%,纳指跌0.5%,标普500指数跌0.03%。存储板块领跌,闪迪跌8%,西部数据跌超6%,美光科技跌超6%,希捷科技跌超7%,SK海力士ADR跌超4%。光通信板块下跌,康宁跌超14%,Coherent跌超6%,迈威尔科技跌超5%,Lumentum跌超5%。
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