周二午后，道琼斯工业平均指数遭遇显著下滑，盘中跌幅达378点，约0.8%。这一跌势主要由美国运通和默沙东的股价下跌驱动，两大巨头拖累了整体表现。
具体而言，美国运通股价下跌8.91美元，跌幅2.8%；默沙东股价下滑2.24美元，跌幅2.7%。两者合计对道指造成约69点的拖累效应。
其他成分股同样加剧了指数下跌，联合健康、旅行者财产险集团和家得宝的股价下滑也贡献良多。指数计算机制显示，道指中任何成分股1美元的股价变动，将引发约6.15点的波动。
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