接下来一段时间，《期权英语》栏目小编将给大家介绍一些与期权波动率相关的关键术语“Deviation — A statistical measure of the historical volatility of a security, portfolio of securities or derivative instruments related to those securities. More specifically, the standard deviation of a security is the extent to which its price can be expected to move up or down from its present level during a given period of time.
“偏差——对证券、证券组合及其相关衍生工具的历史波动率进行统计描述。更准确地说，标准差是指在一段时间内，证券价格会向上或向下变化的幅度。
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