10月20日，美股三大股指期货涨跌不一，截止发稿，道指期货涨0.22%，纳指期货跌0.36%，标普500指数期货跌0.01%。
存储概念股普跌，SK海力士跌超4%，闪迪、美光科技、西部数据跌超2%，希捷科技、慧荣科技跌超1%；
光通信概念股普跌，Applied Optoelectronics跌超4%，Lumentum、Coherent、Astera Labs跌超2%；
3M涨近4%，公司宣布与GSEO合作，推进扩展光束光学器件的制造和研发；
Steel Dynamics跌超4%，Q3调整后每股收益为5.26美元，不及市场预期。
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