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Capital Market Line (CML)

The line from the risk-free rate through the optimal portfolio.

The Capital Market Line shows the risk-return trade-off for efficient portfolios that combine the risk-free asset with the tangency portfolio. Points on the CML represent the best possible risk-return combinations achievable by mixing cash and the optimal risky portfolio.

Formula
E[r]=rf+E[rm]rfσmσE[r] = r_f + \frac{E[r_m] - r_f}{\sigma_m} \cdot \sigma