CAPM Model Case Study

978 Words2 Pages

CAPM model requir the beta, risk-free rate and the expected market risk premium to calculate expected rate of return of the security. From the graph above, it can be seen that, CAPM model has a direct relationship with the capital market line, which is a straight line connecting risk-free assets with the market portfolio. If the market equilibrium exists, all asset prices will be automatically adjusted until it all can be accepted by the investor. In the CAPM formula, “r” is expected return on sercurity, “”rf ” is risk-free rate, “rm” is the return from the market. β can be regarded as the sensitivity of the change of market portfolio to the change of stock return. By analyzing β, it can be concluded that in the pricing of risky investment, …show more content…

More and more acholars believe that the theory of portfolio and the assumption of CAPM model are not match with real market condition, it cannot explain the pricing of capital assets comprehensively. There are large number of empirical studies have show that, the CAPM model is incompleted, because CAPM assume that variance of β is the only factor can affect the future rate of return. However, there are other factors that influnce the pricing of capital assets are emerging, such as book value, market price ratio and so on. Among them, CAPM was seriously called into question in the 1990s by Famar Fama and Franche (1992), they highligt that “beta is dead”. In Fama and Franche’s (1992) studies, they mainly focus on the relationship between the ratio of the book value of a firm’s common stock (BE) to its market value (ME) with rate of retrun of the stock. Fama and Franche (1992) concludes that there are two related points from the research. First, they conclude that BE/ME can basically explain the changes in stock retrun and it have better explanatory power than β. Because the report clear shows that during the period from 1941 to 1990 the relationship between β and average return is weak, moreover, there virtually have no link between β and average retrun from 1963 to 1990. Second, although CAPM model asserts that β is the only factor affect expected retruns on stocks, Fama and Franche (1992) also discovered that there is a negative relationship between the average return on a security with both the market-to-book of the firm ratio (M/B) and the price-earnings of the firm ratio (P/E). It can be seen that, β might not the only factor can affect the expected rate of

More about CAPM Model Case Study

Open Document