← Search Journal of Finance Vol. 20 No. 3 1965 PORTFOLIO SELECTION AND INVESTMENT PERFORMANCE Irwin Friend; Douglas Vickers1 1 VIZJA University DOI10.1111/j.1540-6261.1965.tb02905.x Volume20 Issue3 Pages391-415 Languageen Sources openalex crossref semanticscholar 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 ✓