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Market Returns and Weak-Form Efficiency: the case of the Ghana Stock Exchange

Joseph Frimpong () and Eric Oteng-Abayie

MPRA Paper from University Library of Munich, Germany

Abstract: This paper examines the weak-form efficient market hypothesis (EMH) in the case of the Ghana Stock Exchange (GSE) an emerging market. Daily returns from the Databank Stock Index (DSI) over a 5-year period 1999-2004 were used for the exercise. Random walk (RW) and GARCH(1,1) models are used as the basis for our analysis. The GSE DSI returns series exhibit volatility clustering, an indication of inefficiency on the GSE. The weak-form efficient market (random walk) hypothesis was rejected for the GSE, meaning that the market is inefficient. The inefficient market has important implications for investors, both domestic and international. Knowledge of profitable arbitrage opportunities due to market predictability serves to attract investors to diversify from more efficient markets to invest on the GSE bourse to increase their returns.

Keywords: Ghana Stock Exchange; FINSAP; efficient market hypothesis; nonlinearity test (search for similar items in EconPapers)
JEL-codes: C12 C22 G14 (search for similar items in EconPapers)
Date: 2007-08-08, Revised 2008-03-09
New Economics Papers: this item is included in nep-afr, nep-fmk and nep-rmg
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Citations: View citations in EconPapers (4) Track citations by RSS feed

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