周二早盘交易时段，道琼斯工业平均指数显著下挫，美国运通（American Express）和联合健康保险（UnitedHealth）两大成分股领跌。截至最新数据，道指下跌267点（跌幅0.6%），两大权重股对指数形成显著拖累。
具体来看，美国运通股价重挫7.22美元，跌幅达2.3%；联合健康保险下跌6.43美元，跌幅2.1%。两家公司股价波动合计拖累道指约84点。其他对指数形成较大拖累的成分股包括旅行者保险（Travelers）、默克制药（Merck）以及安进公司（Amgen）。
值得注意的是，道指成分股中任意一只股票出现1美元的价格波动，将引发指数约6.15点的震荡。当前市场波动主要受权重股业绩预期调整及宏观经济数据影响，投资者正密切关注企业财报季表现。
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