The Efficient Frontier
The CAPM assumes that the risk-return profile of a portfolio can be optimized—an optimal portfolio displays the lowest possible level of risk for its level of return. Additionally, since each additional asset introduced into a portfolio further diversifies the portfolio, the optimal portfolio must comprise every asset, (assuming no trading costs) with each asset value-weighted to achieve the above (assuming that any asset is infinitely divisible). All such optimal portfolios, i.e., one for each level of return, comprise the efficient frontier.
Because the unsystematic risk is diversifiable, the total risk of a portfolio can be viewed as beta.
Read more about this topic: Capital Asset Pricing Model
Famous quotes containing the words efficient and/or frontier:
“The truly efficient laborer will not crowd his day with work, but will saunter to his task, surrounded by a wide halo of ease and leisure, and then do but what he loves best. He is anxious only about the fruitful kernels of time.”
—Henry David Thoreau (1817–1862)
“What is an artist? A provincial who finds himself somewhere between a physical reality and a metaphysical one.... It’s this in-between that I’m calling a province, this frontier country between the tangible world and the intangible one—which is really the realm of the artist.”
—Frederico Fellini (b. 1920)