标普500指数低开14.15点,跌幅0.21%,报6886.85点;道琼斯工业平均指数高开10.74点,涨幅0.02%,报4 标普500指数低开14.15点,跌幅0.21%,报6886.85点;道琼斯工业平均指数高开10.74点,涨幅0.02%,报4...