← Search Journal of Finance Vol. 36 No. 4 1981 Risk Decomposition and Portfolio Diversification When Beta is Nonstationary: A Note Son-Nan Chen; Arthur J. Keown DOI10.2307/2327558 Volume36 Issue4 Pages941 Sources semanticscholar openalex crossref Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓