Frontmatter -- Contents -- Streetwise -- Introduction -- PART ONE: Market Behavior -- Challenge to Judgment (Fall 1974) -- The Dividend Puzzle (Winter 1976) -- The Capital Asset Pricing Model and the Market Model (Winter 1981) -- Factors in New York Stock Exchange Security Returns, 1931-1979...

There is an exact linear relation between expected returns and true 'betas' when the market portfolio is on the ex ante mean-variance efficient frontier but empirical research has found little relation between sample mean returns and estimated betas. A possible explanation is that market...