Research Article | OPEN ACCESS
Test of Random Walk Hypothesis in the Nigerian Stock Market
Joel Obayagbona and Sunday Osaretin Igbinosa
Department of Banking and Finance, Faculty of Management Sciences, University of Benin, Benin City, P.M.B. 1154, Edo State, GSM: 08038874566
Current Research Journal of Social Sciences 2015 2:27-36
Received: May 19, 2014 | Accepted: June 18, 2014 | Published: April 25, 2015
Abstract
The paper investigates the weak-form market hypothesis in the emerging capital market of Nigeria from January 2006 to December 2011. It uses three tests of randomness based on autoregressive technique to check for the presence or otherwise of autocorrelation in daily stock prices and returns from the Nigerian Stock Market. All the tests including the Z-statistics for both stock prices and their returns show significant indications of dependence in return series and hence, of non-randomness. The overall results suggest that the emerging Nigerian Stock Market is not efficient in the weak form. The paper recommends that policy makers and regulatory authorities should enact and implement policy measures and put in place necessary market structures that would promote the efficiency of the Nigerian Stock Market.
Keywords:
Autocorrelation, efficient market hypothesis, randomness, stock returns and weak-form efficiency,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2041-3246
ISSN (Print): 2041-3238 |
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