← Search Journal of Finance 1970 Essentials of Portfolio Diversification Strategy James C. T. Mao DOI10.2307/2325582 Sources semanticscholar openalex 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 ✓