← Search Journal of Finance Vol. 31 No. 1 1976 Portfolio Returns and the Random Walk Theory: Reply Pao L. Cheng; M. King Deets DOI10.2307/2326407 Volume31 Issue1 Pages157 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 ✓