The Risk-Return Relationship and Stock Prices

Benjamin Bachrach and Dan Galai

Journal of Financial and Quantitative Analysis, 1979, vol. 14, issue 2, 421-441

Abstract: According to the current state of knowledge in finance, the expected rate of return adjusted for risk is independent of the stock price. The basic proposition of the capital asset pricing model (CAPM) is that the expected rate of return for each security is a function of the “risk” of that security, and that this risk is measured by the contribution of the security to the variability of the market portfolio. The implication of the CAPM is that knowing the price of a security perse will add nothing to predicting its expected rate of return.

Date: 1979
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