机构地区: 四川联合大学
出 处: 《经济数学》 1997年第2期22-31,共10页
摘 要: 本文针对项目组合投资问题引入了风险度概念,并建立其风险度模型.在无零风险度项目的情况下,给出了该模型的最优项目组合投资策略并证明该策略为马氏有效.在有零风险度项目的情况下,讨论了该模型的有效前沿的结构、性质和有效性,同时还论证了该模型的有效前沿与威廉·夏普提出的资本资产定价模型的有效前沿相一致的线性关系.最后作为本模型的应用,构造了”保证还本”模型,给出了其最优项目投资组合的策略. This paper puts forward the concept of risk degree and establishes risk degree model for theportfolio selection of items. Under the condition of risk --free securities not existing, it gives the optimalportfolio decision and proves that one is Markowitz--efficiency. Under the condition of the risk--free securities existing, it studies structure, property and efficiency of efficient frntier of risk degree model respectively,and gains the same linear relations like the CAPM model by W. F. Sharpe. At last, as an application of riskdegree model, it sets up guarantee--capital model and gives the model,s optimal portfolio decision.
领 域: [经济管理]