V2EX capital market line

Capital Market Line

定义 Definition

资本市场线(CML):在资本资产定价模型(CAPM)的框架下,表示“由无风险资产与市场组合按不同比例构成的有效投资组合”所能达到的期望收益总风险(标准差)关系的一条直线。它刻画了在存在无风险利率时,投资者通过组合配置所能获得的最优风险回报权衡。
(注:与 Security Market Line, SML 不同,CML 用的是总风险(σ);SML 用的是系统性风险(β)。)

发音 Pronunciation (IPA)

/kptl mrkt lan/

例句 Examples

The capital market line links the risk-free rate to the market portfolio.
资本市场线把无风险利率与市场组合连接起来。

If a portfolio lies below the capital market line, it offers too little expected return for its level of total risk, so an investor could improve efficiency by moving toward the market portfolio and the risk-free asset.
如果某个投资组合落在资本市场线下方,说明在同等总风险下它的期望收益偏低;投资者可以通过向“市场组合 + 无风险资产”的配置方向调整来高效率。

词源 Etymology

该术语由 capital(资本)+ market(市场)+ line(直线)构成,出自 20 世纪 60 年代形成的现代金融理论体系,尤其与 CAPM 的提出与推广相关(常与 Sharpe、Lintner、Mossin 等学者的均衡定价研究一同被讨论)。其核心思想是:在允许借贷或投资于无风险资产时,有效前沿的一部分可被一条从无风险利率出发、切于市场组合的直线所“替代”或表征。

相关词 Related Words

文学与典籍 Literary Works

  • William F. Sharpe, “Capital Asset Prices: A Theory of Market Equilibrium under Conditions of Risk”(1964)
  • CFA Institute, CFA Program Curriculum(投资组合管理/资产定价相关章节)
  • Zvi Bodie, Alex Kane, Alan J. Marcus, Investments(多版教材中讨论 CML 与 SML)
  • Richard A. Brealey, Stewart C. Myers, Franklin Allen, Principles of Corporate Finance(涉及 CAPM 与风险回报的相关部分)
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