作 者: ;
机构地区: 中山大学管理学院
出 处: 《系统工程理论与实践》 2011年第12期 2272-2280,共9页
摘 要: 在CIR模型基础上,通过引入折现熵,研究了模型不确定性条件下的一般均衡定价例题:并导出了模型不确定性条件下的无风险利率定价方程、跨期资本资产定价模型、基于消费的资本资产定价模型、金融资产定价公式及包含不确定性成分的随机折现因子.研究发现,随着投资者的不确定性规避偏好的提高,均衡时的无风险利率随之降低,风险资产的溢价水平却随之提高,因此文章结论可以同时解释无风险利率之谜与风险溢价之谜. By introducing discounted entropy into the CIR model, this article investigates general equilibrium asset pricing under model uncertainty. A risk-free rate pricing equation, an intertemporal capital asset pricing model, a consumption-based capital asset pricing model, a financial asset pricing formula and a stochastic discounted factor are derived under model uncertainty. It is found that model uncertainty aversion decreases the equilibrium risk-free rate while increases the equity premium, and hence the new asset pricing model can explain the risk-free rate puzzle and equity premium puzzle simultaneously.
分 类 号: [F830.9]
领 域: []