8月21日，美股三大股指期货盘前集体上涨，截至发稿，道指期货升0.22%，纳指期货升0.52%，标普500指数期货升0.27%。
加密货币概念股盘前走强， Strategy涨超8%， Coinbase Global, Inc.涨近6%， Circle Internet Corp.涨近5%；比特币此前强势突破7.5万美元；
存储股普涨， SK海力士、 西部数据、 希捷科技均涨约2%。
罗斯百货涨超3%，Q2业绩超预期，并上调2026财年业绩展望；
OSI Systems跌超14%，Q4业绩符合预期，但业绩指引令投资者失望；
Moderna续跌逾1%，隔夜收盘跌23.5%。
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