← Search Econometrica Vol. 29 No. 1 1961 Portfolio Selection A. D. Roy; Harry M. Markowitz DOI10.2307/1907702 Volume29 Issue1 Pages99 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 ✓