Bridge over ocean
1 September 2006 Financial Analysts Journal Volume 62, Issue 5

Why Company-Specific Risk Changes over Time

  1. James A. Bennett
  2. Richard W. Sias

Company-specific risk climbed steadily between 1962 and 1999 in the U.S. market but fell sharply between 2000 and 2003. This article explores the hypothesis that three factors are primarily responsible for observed changes in company-specific risk: changes in the market weights of “riskier” industries, changes in the relative role of small-capitalization stocks in the market, and measurement error associated with changes in within-industry concentration. Empirical tests reveal that each factor contributes to changes in company-specific risk over time and that, combined, these three factors largely explain changes in company-specific risk over the past 40 years.

Read the Complete Article in Financial Analysts Journal Financial Analysts Journal CFA Institute Member Content

We’re using cookies, but you can turn them off in Privacy Settings.  Otherwise, you are agreeing to our use of cookies.  Accepting cookies does not mean that we are collecting personal data. Learn more in our Privacy Policy.