股票指数的中文解释

以数字形式显示整个市场相对于过去某"基准"参考日期运行的表现。计算方法有两种：加权的和不加权的。不加权的指数指简单算术平均或几何平均数。算术平均数指将指数的构成股的价格变化百分比相加，然后除以构成股的数量。几何平均数是一种相当准确的计算方法，计算时将指数中所有股票的价格连乘积，然后按计算股票平均数的数量n开n次方根。几何平均数的使用频率不如算术平均数。在加权指数中，有些股票的权重要大于另一些股票，权重的大小通常以股票的市值为基础。

Stock Index的英文解释

A market index is a numerical representation of the way an entire market has performed relative to some 'base' reference date in the past. They are calculated in two ways - weighted or unweighted. Unweighted indices are simple arithmetic or geometric averages. An arithmetic average adds up all the percentage changes in the prices of the constituent stocks and then divides that by the number of stocks in the index. The geometric average is a very precise measurement, calculated by multiplying all the prices of the shares in the index and taking the nth root where n is the number of shares you are averaging. It is much less frequently used than an arithmetic average. In Weighted indices, certain stocks carry a greater weighting than others, usually based on their market value or capitalization.

• relative [´relətiv]   a.有关系的 n.亲属   (初中英语单词)
• reference [´refərəns]   n.参考；参照；出处   (初中英语单词)
• percentage [pə´sentidʒ]   n.百分数；比例；部分   (初中英语单词)
• measurement [´meʒəmənt]   n.测量；尺寸；宽度   (初中英语单词)
• representation [,reprizen´teiʃən]   n.描写；表现(法)   (高中英语单词)
• arithmetic [ə´riθmətik]   n.算术   (英语四级单词)
• constituent [kən´stitʃuənt]   n.成分；要素；选民   (英语四级单词)
• precise [pri´sais]   a.精确的；清楚的   (英语四级单词)
• taking [´teikiŋ]   a.迷人的 n.捕获物   (英语六级单词)