Economic Journal of Emerging Markets
Volume 12 Issue 2, 2020

Unit root tests in the presence of structural breaks: Evidence from African stock markets

Osarumwense Osabuohien-Irabor (Department of International Economics, School of Economics and Management, Ural Federal University, Yekaterinburg, Sverdlovsk Oblast, Russia.)



Article Info

Publish Date
07 Oct 2020

Abstract

This paper examines whether stock prices for fourteen African countries are affected by transitory or permanent shocks. This study answers whether Africa stock market indices are mean-reverting or random-walk in the presence of multiple structural breaks. To investigate African equity price behavior, we considered one and two endogenously determined structural break tests of Zivot and Andrews (1992) and Lumsdaine and Papell (1997), respectively. Findings/Originality: Our results show that almost all African equity price indices follow the random walk processes except for Senegal and Botswana, which exhibit mean-reversion properties in its equity prices. It implies that investors in African stock markets cannot rely on past information and behavior to predict stock market movements or develop their trading strategies. The result also confirms that the Augmented Dickey-Fuller (ADF) unit root test is not applicable in the presence of structural breaks in African stock markets.

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Journal Info

Abbrev

JEP

Publisher

Subject

Economics, Econometrics & Finance

Description

The Economic Journal of Emerging Markets (EJEM) is a peer-reviewed journal which provides a forum for scientific works pertaining to emerging market economies. Published every April and October, this journal welcomes original research papers on all aspects of economic development issues. The journal ...