应用材料（AMAT）今日盘中股价大跌5.65%，引发市场广泛关注。该股在夜盘及盘前交易时段已持续走低，盘中跌幅进一步扩大，反映出投资者对半导体设备板块的悲观情绪持续升温。
消息面上，此次下跌受到多重因素共同影响。首先，有“大空头”之称的迈克尔·伯里此前公开披露了对应用材料的空头仓位，并持续加码做空AI及半导体板块，预计相关芯片股整体可能出现约30%的调整，这一消息持续发酵令市场承压。其次，外电报道中国已实现国产DUV光刻机的量产，加剧了市场对半导体设备行业竞争格局的担忧。此外，市场对AI基础设施巨额支出能否产生回报的疑虑也在升温，英伟达、美光科技等AI芯片龙头股盘中普遍走低，费城半导体指数较6月历史高点已下跌逾20%。
本周晚些时候，亚马逊、Meta、苹果和微软等AI超大规模企业将陆续公布财报，投资者正密切关注其数千亿美元的投资是否正在产生回报，这些财报预计将为芯片及AI基础设施的需求前景提供进一步线索。
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