Stock Indices and Averages 股票指数和平均指数 Index A collection of statistics that measures, from a base, changes in an economy or market. 指数 一系列按照某个基数记录经济或市场变化的统计数据。 Average A type of index reflecting the weighted performance of a small number of components. 平均指数 反映一小批成分加权表现的一类指数。 Base Period A standard value, usually set at the establishment of an index, from which its current level is calculated. 基准期 标准值,通常在指数建立时确定,以当时的状况计算。 Standard and Poor’s An American corporation which publishes a wide range of market information including ratings, indexes, and listings. 标准普尔指数 公布各种排名、指数和列表等市场信息的一家美国公司。 S&P 500 A measure of the performance of 500 widely-held common stocks. 标准普尔500指数 记录500种普遍持有的常见股票的指数。 Weighted (Average or Index) An average or index in which the performance of more heavily capitalized components have a greater influence. 加权(平均指数或指数) 资本化更大的成分具有更大影响力的综合指数或指数。 Relative Strength Strength or weakness of a particular stock when measured against a broader index or market. 相对强度 当对照更广泛指数或市场时某一股票的的力量或缺陷。 SPX Basic option symbol for S&P 500 index options. 标准500指数期权 标准普尔500指数期权的基本期权标志。