什么是资本资产定价模型,如何使用

2025-01-23 02:23:47
推荐回答(2个)
回答1:

 资本资产定价模型(Capital Asset Pricing Model 简称CAPM)是由美国学者夏普(William Sharpe)、林特尔(John Lintner)、特里诺(Jack Treynor)和莫辛(Jan Mossin)等人在资产组合理论的基础上发展起来的,是现代金融市场价格理论的支柱,广泛应用于投资决策和公司理财领域。
  资本资产定价模型就是在投资组合理论和资本市场理论基础上形成发展起来的,主要研究证券市场中资产的预期收益率与风险资产之间的关系,以及均衡价格是如何形成的.
  资本资产定价模型的假设:(1)市场是均衡的并不存在摩擦;(2)市场参与者都是理性的;(3)不存在交易费用;(4)税收不影响资产的选择和交易
计算方法:
  E(ri)=rf +βim(E(rm)-rf ) 其中:
  E(ri) 是资产i 的预期回报率
  rf 是无风险率
  βim 是[[Beta系数]],即资产i 的系统性风险
  E(rm) 是市场m的预期市场回报率
  E(rm) �6�1 rf 是市场风险溢价(market risk premium),即预期市场回报率与无风险回报率之差。
  解释:
  以资本形式(如股票)存在的资产的价格确定模型。以股票市场为例。假定投资者通过基金投资于整个股票市场,于是他的投资完全分散化(diversification)了,他将不承担任何可分散风险。但是,由于经济与股票市场变化的一致性,投资者将承担不可分散风险。于是投资者的预期回报高于无风险利率。
  设股票市场的预期回报率为E(rm),无风险利率为 rf,那么,市场风险溢价就是E(rm) �6�1 rf ,这是投资者由于承担了与股票市场相关的不可分散风险而预期得到的回报。考虑某资产(比如某公司股票),设其预期回报率为Ri,由于市场的无风险利率为Rf,故该资产的风险溢价为 E(ri)-rf 。资本资产定价模型描述了该资产的风险溢价与市场的风险溢价之间的关系 E(ri)-rf =βim (E(rm) �6�1 rf ) 式中,β系数是常数,称为资产β (asset beta)。
  β系数表示了资产的回报率对市场变动的敏感程度(sensitivity),可以衡量该资产的不可分散风险。 如果给定β,我们就能确定某资产现值(present value)的正确贴现率(discount rate)了,这一贴现率是该资产或另一相同风险资产的预期收益率 贴现率=Rf+β(Rm-Rf)。

回答2:

你的问题,好专业,不过这只是一个虚似的形式,不要过于追溯。

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