成份股又称指数股,是指在股票价格指数(如恒生指数道琼斯工业指数)计算中所选用的股票,一般会是股票市场中的重要股票,而且可以反映股票市场的特点或是趋势。

道琼斯工业指数中,其成份股有通用电气宝洁沃尔玛等。

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