Line relating expected returns to overall risk for all investments that can be formed by combining the riskless asset with market portfolio in various proportions.

A graph relating risk and average expected return.

The line used in the Capital Asset Pricing Model to illustrate the rates of return for efficient portfolios depending on the risk free rate of return and the level of risk ( beta) for a particular portfolio.

In the CAPM, the line which is tangent to the efficient frontier and crosses the vertical axis at the risk-free rate. Portfolios on the line are said to be 'super-efficient' and consist of the market portfolio leveraged or deleveraged by the risk-free rate.

In portfolio theory, the theoretical line representing all possible combinations of risk and return in a market. It represents the maximum return available for each level of risk.

a set of portfolios obtainable by leveraging or de-leveraging positions in a "super-efficient" portfolio.

The line defined by every combination of the risk-free asset and the market portfolio.

A line which describes the optimal relationship between risk and reward for an investment portfolio.