Capital asset pricing model
In finance, the capital asset pricing model (CAPM) is used to calculate a theoretically appropriate required rate of return of an asset, if that asset is to be included to an already well-diversified portfolio, provided that asset''s non-diversifiable risk. The model takes into account the asset''s compassion to non-diversifiable risk (also define as systematic risk or market risk), often presented by the quantity beta (β) in the financial industry, as well as the expected return of a theoretical risk-free asset and expected return of the market.
The model was introduced by Jack Treynor (1961, 1962) William Sharpe (1964), Jan Mossin (1966) and John Lintner (1965a,b) independently, creating on the earlier work of Harry Markowitz on modern portfolio theory and diversification. Sharpe, Merton Miller and Markowitz jointly received the Nobel Memorial Prize in Economics for this role to the field of financial economics.