Here α is the symbol for alpha, β stands for beta, and x is the return of the market. Th e market- related return of the portfolio is equal to its beta times the market return, and alpha (skill- related return) is added to arrive at the total return (of course, theory says there’s no such thing as alpha).
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portfolio with a beta above...
Of course, I also dismiss the idea that the alpha term in the equation has to be zero. Investment skill exists, even though not everyone has it. Only through thinking about risk- adjusted return might we determine whether an investor possesses superior insight, investment skill or alpha . . . tha...
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