← Search Journal of Finance Vol. 26 No. 1 1971 PORTFOLIO RETURNS AND THE RANDOM WALK THEORY Pao L. Cheng; M. King Deets1 1 High Throughput Biology (United States) DOI10.1111/j.1540-6261.1971.tb00585.x Volume26 Issue1 Pages11-30 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 ✓