美股开盘，道指跌0.6%，标普500指数跌0.3%，纳指跌0.5%。美光科技(MU.US)上涨0.4%，公司加码美国内存研发，计划十年投资100亿美元。沃尔玛(WMT.US)下跌7%，Q2同店销售增速创六年新低，全年盈利指引低于预期。SK海力士(SKHY.US)上涨4%，劳资达成初步薪资协议。阿里巴巴(BABA.US)绩后跌4.7%，网易(NTES.US)绩后跌0.5%。
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