摘要：数学与生活,特别是经济生活,有着千丝万缕的联系.在我们的日常生活中，数学已不再是单纯的用作计数或统计,还常用于经济生活决策中.比如说股市,炒股不仅需要精明的经济头脑和良好的心理素质,更需要一定的数学知识,分析、综合、推理、计算和决策,数学无时无刻不在显示它在股市中的作用.本文运用相关数学知识,结合实例分析股市中三种常见的股票指数的计算方法,以帮助人们在投资生活中更好地认识和利用股票指数.

关键字：数学； 股票； 指数； 方法

Abstract：Mathematics and life, especially in economic life, are inextricably linked.In our daily life, mathematics is no longer a simple as a count or statistics, but also commonly used in the economic life decision-making.For example, the stock market, stocks requires not only a shrewd economic sense and good psychological quality, but require a certain amount of mathematical knowledge, analysis, synthesis, reasoning, calculation  and  decision-making, mathematics all the time to show it in the stock market . This paper use the related mathematical knowledge, combined with examples to analyzes the three common stock index calculation method in stock market, and help people better understanding and using the stock index in the investment in life .

Key words：mathematics; stock ; index; method