Chapter 13 – Empirical Evidence on Security Returns
13–24
Short Answer Questions
55. Discuss the results of the studies of John Lintner (1965) and Merton Miller and Myron
Scholes (1972) in terms of the validity of the capital asset pricing model (CAPM).
These studies examined the returns of 631 NYSE listed stocks over the period, 1954 – 1963.
These results indicated that the SML was “too flat”, i.e., the g1 coefficient was too small and
the slope was too small, as predicted by the CAPM. These results were statistically
significant. In addition, nonsystematic risk, not systematic risk, appeared to predict expected
excess returns. However, these studies contained two methodological problems. First, the
Difficulty: Moderate
56. Discuss the Black Jensen Scholes (BJS) study of the zero-beta version of the CAPM.
Black, Jensen, and Scholes studied all available NYSE stock returns over the period 1931 to
1965. Their results indicated that the zero-beta version of the CAPM might better explain
observed market relationships than the simple version of the CAPM. When borrowing is
restricted, the CAPM expected return-beta relationship must be amended; that is, the risk-free
Difficulty: Moderate