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How to Find Alpha and Plot The Security Market Line (SML) on Excel
The security market line is a visual representation of CAPM. By plotting a managers performance on the SML we are able to easily compare how a manager performed vs the expected value of a stock.
Definitions:
Security market line is the representation of the capital asset pricing model. It displays the expected rate of return of an individual security as a function of systematic, non-diversifiable risk
In finance, the capital asset pricing model is a model used to determine a theoretically appropriate required rate of return of an asset, to make decisions about adding assets to a well-diversified portfolio.
Alpha is a measure of the active return on an investment, the performance of that investment compared with a suitable market index.
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