DEFINITION of 'Capital Market Line  CML'
A line used in the capital asset pricing model to illustrate the rates of return for efficient portfolios depending on the riskfree rate of return and the level of risk (standard deviation) for a particular portfolio.
VIDEO
BREAKING DOWN 'Capital Market Line  CML'
The CML is derived by drawing a tangent line from the intercept point on the efficient frontier to the point where the expected return equals the riskfree rate of return.
The CML is considered to be superior to the efficient frontier since it takes into account the inclusion of a riskfree asset in the portfolio. The capital asset pricing model (CAPM) demonstrates that the market portfolio is essentially the efficient frontier. This is achieved visually through the security market line (SML).

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