证券收益中既存在随机不确定性,又存在模糊不确定性,可以引入混合熵这一指标来衡量证券的风险,以衡量由概率不确定性和模糊不确定性的混合不确定性。在不考虑模糊因素时且收益服从正态分布时,混合熵与方差在衡量风险时等价;而在收益非正态分布以及考虑证券收益模糊性时,混合熵在证券风险衡量时更符合现实情况。 There is both stochastic uncertainty and fuzzy uncertainty in the return of securities, and mixed entropy can be introduced to measure the risk of securities to measure the mixed uncertainty caused by the uncertainty of probability and fuzzy uncertainty. Without considering the fuzzy factor and the income obeys the normal distribution, the mixed entropy and the variance are equivalent when measuring the risk. When the non-normal distribution of returns and the fuzziness of the return of the securities, the hybrid entropy is more realistic in measuring the securities risk Happening.