老师好,这段话是否可以这样理解:按照VAR的公式=|E(r)-Z*volatility| ,当holding period增加时,volatility增加,所以VAR increases at a decreasing rate。 但是我不理解为何当confidence interval增加时,Z会变大,为何VAR会增长?而非increasing at decreasing rate or decreasing?
已解决
Why don’t we need to divided standard error of coefficient by 460 or 460-k-1 to calculate t statistic ?