Does Automation Improve Stock Market Efficiency? Evidence from Ghana
AbstractAs a burgeoning capital market in an emerging economy, automation of the stock market is regarded as a major step towards integrating the financial market as a conduit for economic growth. The automation of the Ghana Stock Exchange (GSE) in 2008 is expected among other things to improve the efficiency of the market. This paper therefore investigates the impact of the automation on the efficiency of the GSE within the framework of the weak-form Efficient Market Hypothesis (EMH) using daily market returns from the Ghana Stock Exchange All-Share index from 2006 to 2011. The Unit Root Random Walk and the GARCH models were used to analyze the efficiency of the GSE in the pre and post automation sample periods. Results show that the GSE was weakly inefficient in both pre and post automation periods, suggesting that the automation of the GSE have not yielded the needed impact towards improving the efficiency of the exchange.
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Bibliographic InfoPaper provided by University Library of Munich, Germany in its series MPRA Paper with number 43642.
Date of creation: 19 Aug 2012
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Stock; efficiency; automation; Ghana;
Find related papers by JEL classification:
- E0 - Macroeconomics and Monetary Economics - - General
- A1 - General Economics and Teaching - - General Economics
- G0 - Financial Economics - - General
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- Bollerslev, Tim, 1986. "Generalized autoregressive conditional heteroskedasticity," Journal of Econometrics, Elsevier, vol. 31(3), pages 307-327, April.
- Graham Smith & Keith Jefferis & Hyun-Jung Ryoo, 2002. "African stock markets: multiple variance ratio tests of random walks," Applied Financial Economics, Taylor and Francis Journals, vol. 12(7), pages 475-484.
- Sharma, J. L. & Kennedy, Robert E., 1977. "A Comparative Analysis of Stock Price Behavior on the Bombay, London, and New York Stock Exchanges," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 12(03), pages 391-413, September.
- Graham Smith, 2008. "Liquidity And The Informational Efficiency Of African Stock Markets," South African Journal of Economics, Economic Society of South Africa, vol. 76(2), pages 161-175, 06.
- A. Sabur Mollah, 2007. "Testing Weak-Form Market Efficiency In Emerging Market: Evidence From Botswana Stock Exchange," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 10(06), pages 1077-1094.
- James M. Poterba & Lawrence H. Summers, 1989.
"Mean Reversion in Stock Prices: Evidence and Implications,"
NBER Working Papers
2343, National Bureau of Economic Research, Inc.
- Poterba, James M. & Summers, Lawrence H., 1988. "Mean reversion in stock prices : Evidence and Implications," Journal of Financial Economics, Elsevier, vol. 22(1), pages 27-59, October.
- Appiah-Kusi, Joe & Menyah, Kojo, 2003. "Return predictability in African stock markets," Review of Financial Economics, Elsevier, vol. 12(3), pages 247-270.
- Maria Rosa Borges, 2008.
"Efficient Market Hypothesis in European Stock Markets,"
2008/20, Department of Economics at the School of Economics and Management (ISEG), Technical University of Lisbon..
- Maria Rosa Borges, 2010. "Efficient market hypothesis in European stock markets," The European Journal of Finance, Taylor & Francis Journals, vol. 16(7), pages 711-726.
- Samir Saadi & Devinder Gandhi & Shantanu Dutta, 2006. "Testing For Nonlinearity & Modeling Volatility In Emerging Capital Markets: The Case Of Tunisia," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 9(07), pages 1021-1050.
- Hudson, Robert & Dempsey, Michael & Keasey, Kevin, 1996. "A note on the weak form efficiency of capital markets: The application of simple technical trading rules to UK stock prices - 1935 to 1994," Journal of Banking & Finance, Elsevier, vol. 20(6), pages 1121-1132, July.
- Freund, William C & Pagano, Michael S, 2000. "Market Efficiency in Specialist Markets Before and After Automation," The Financial Review, Eastern Finance Association, vol. 35(3), pages 79-104, August.
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