In finance, we know that risk is defined as uncertainty since we are unable to predict the future more accurately. Based on the assumption that prices follow a lognormal distribution and returns follow a normal distribution, we could define risk as standard deviation or variance of the returns of a security. We call this our conventional definition of volatility (uncertainty). Since a normal distribution is symmetric, it will treat a positive deviation from a mean in the same manner as
pffs15_Shapiro_Anderson_normaltest_skewness_Sortino_Bartlett_homoskedasticity_heteroskedasticity
于 2022-12-17 05:26:01 首次发布