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Efficient Portfolio

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Efficient portfolio
A portfolio that provides the greatest expected return for a given level of risk (i.e., standard deviation), or, equivalently, the lowest risk for a given expected return.

Markowitz Efficient Portfolio
In Markowitz Portfolio Theory, a portfolio with the highest level of return at a given level of risk. One who carries such a portfolio cannot further diversify to increase the expected rate of return without accepting a greater amount of risk. Likewise one cannot decrease his/her exposure to risk without proportionately decreasing the expected return. A Markowitz efficient portfolio is determined mathematically and plotted on a chart with risk as the x-axis and expected return as the y-axis. See also: Markowitz efficient set of portfolios, Homogeneous expectations assumption.

efficient portfolio
A combination of investments that offer either the highest possible yield at a given risk level or the lowest possible risk at a given yield level. Although the concept of an efficient portfolio is important to understand, in practice it is more academic than practical.


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The first result indicates that in the presence of a riskless asset and information costs regarding the n risky assets in the economy, (i) there exists a unique pair of efficient portfolio known as mutual funds, and (ii) the return distribution on the risky fund is log-normal.
As could be expected from the risk-return structure and correlation characteristics, RE stocks dominate the efficient portfolio in all but the lowest return levels.
 
 
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