Ntim, Collins G and Opong, Kwaku K and Danbolt, Jo and Dewotor, Frank (2008): Can emerging African Stock Markets improve their informational efficiency by formally harmonising and integrating their operations?
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Despite experiencing rapid growth in their number and size, African stock markets remain highly segmented, small, illiquid and technologically bankrupt, severely affecting their informational efficiency. On this basis, with specific focus on the weak-form of the efficient markets hypothesis, we attempt to empirically ascertain whether African stock markets can improve their informational efficiency by formally harmonising and integrating their operations using a new robust non-parametric variance-ratios test in addition to its parametric alternative. On average, we find that irrespective of the diagnostic used, all the 24 African continent-wide indices applied returns’ display better normal distribution properties than those of the 8 individual national stock price indices examined. We record evidence of statistically significant improvements in the informational efficiency of the African continent-wide stock price indices over the individual national stock price indices used irrespective of the test statistic applied. The potential improvement in efficiency to be gained is much higher in economic sectors indices than in size and regional indices. Finally, consistent with prior evidence, (eg., Wright, 2000; Belaire-Franch and Opong, 2005, Ntim, et al., 2007), the results of the Lo and MacKinlay (1988) parametric variance-ratios test are ambiguous. By contrast, the ranks and signs alternative offer consistent results throughout.
|Item Type:||MPRA Paper|
|Original Title:||Can emerging African Stock Markets improve their informational efficiency by formally harmonising and integrating their operations?|
|English Title:||Can emerging African Stock Markets improve their informational efficiency by formally harmonising and integrating their operations?|
|Keywords:||African stock markets, Integration, Efficiency, Variance-ratios, Ranks and signs|
|Subjects:||G - Financial Economics > G1 - General Financial Markets > G14 - Information and Market Efficiency; Event Studies
G - Financial Economics > G1 - General Financial Markets > G10 - General
|Depositing User:||collins g Ntim|
|Date Deposited:||18. Jul 2011 12:34|
|Last Modified:||15. Feb 2013 14:16|
African Securities Exchanges Association(1993), “Memorandum and Article of Association”, Nairobi, Kenya, African Securities Exchanges Association: http://www.africansea/ (accessed on 15 May 2008).
Appiah-Kusi, J. and Menyah, K. (2003),“Return Predictability in African Stock Markets”, Review of Financial Economics, Vol. 12, pp.247-270.
Ayadi, F. O. (1984), “The Random Walk Hypothesis and the Behaviour of Share Prices in Nigeria”, Nigerian Journal of Economic and Social Studies, Vol. 26 No. 1, pp.57-71.
Ayadi, O. F. and Pyun, C. S. (1994), “An Application of Variance ratio Test to the Korean Securities Market”, Journal of Banking and Finance, Vol. 18, pp.643-658.
Belaire-Franch, J. and Opong, K. K. (2005), “A Variance Ratio Test of the Behaviour of Some FTSE Equity Indices Using Ranks and Signs”, Review of Quantitative Finance and Accounting, Vol. 24, pp.93-107.
Bombay Stock Exchange, available: http://www.bseindia.com/ (accessed on 12 May 2008).
Botswana Stock Exchange, available at: http://www.bse.co.bw/ (accessed on 12 May 2008).
Bourse de Tunis, available at: http://www.bvmt.com.tn/EN/documentation/trading/(accessed on 12 May 2008).
BRVM, available at: http://www.brvm.org/en/intervenant/ (accessed on 14 May 2008).
Bursa Malaysia, available at: http://www.bursamalaysia.com/website/bm/about_us/the_organisation/history.ht.(accessed on 11 May 2008).
Campbell, J. Y., Lo, A. W. and MacKinlay, A. C. (1997), The Econometrics of Financial Markets, Princeston Universtiy Press, Princeston.
Chow, K. V. and Denning, K. C. (1993), “A Simple Multiple Variance Ratios Test”, Journal of Econometrics, Vol. 58, pp.385-401.
Claessens, S., Dasgupta, S. and Glen, J. (1995), “Return Behaviour in Emerging Stock Markets”, World Bank Economic Review, Vol. 9, pp.131-152.
Cowles, A. III. (1933), “Can Stock Market Forecasters Forecast?”, Econometrica, Vol. 1, pp.309-324.
Databank, (2008), Africa Stock Markets: 2007 Review & Outlook, Group Research. Dares Salaam Stock Exchange, available at: http://www.darstockexchange.com/history.asp (accessed on 12 May 2008).
Dickinson, J. P. and Muragu, K. (1994), “Market Efficiency in Developing Countries: A Case Study of the Nairobi Stock Exchange”, Journal of Business Finance & Accounting, Vol. 21 No. 1, pp.133-150.
Fama, E. (1965), “The Behaviour of Stock Market Prices”, Journal of Business, Vol. 38, pp.34-105.
Fama, E. F. (1970), “Efficient Capital Markets: A Review of Theory and Empirical Tests”, Journal of Finance, Vol. 25, pp.382-417.
Fama, E. F. (1991), “Efficient Capital Markets: II”, The Journal of Finance, Vol. XLVI, No. 5, pp.1575-1617.
Fish, T. and Biekpe, N. (2002), “Regional African Stock Markets Indices”, South African Journal of Business Management, Vol. 33 No. 1, pp.11-19.
Fifield, S. G. M., Power, D. M. and Sinclair, D. C. (2005), “An Analysis of Trading Strategies in Eleven European Stock Markets”, The European Journal of Finance, Vol. 11 No. 6, p.531-548.
FTSE Annual Country Classification, available at: http://www.ftse.com/Indices/Country_Classification/index.jsp (accessed on 11 May 2008).
Global Stock Markets Clock available at: http://www.marketclocks.com/index.php?login_error=2 (accessed on 10 May 2008).
Hong Kong Stock Exchange and Clearing, available at: http://www.hkex.com.hk/index.htm (accessed on 11 May 2008).
Hsieh, D. (1991), “Chaos and Nonlinear Dynamics: Application to Financial Markets”, Journal of Finance, Vol. 46, pp.1839-1877.
IMF, available at: http://www.imf.org/external/ (accessed on 14 May 2008).
Irving, J. (2000), “Africa’s Struggling Stock Exchanges: Boost to Economic Development or costly irrelevance?”, African Recovery, Vol. 14, No. 3, pp.1-5.
Irving, J. (2005), “Regional Integration of Stock Exchanges in Eastern and Southern Africa: Progress and Prospects”, Working Paper[WP/05/122], IMF, June 2005.
Jefferis, K. and Smith, G. (2005), “The Changing Efficiency of African Stock Markets”,South African Journal of Economics, Vol. 73 No. 1, pp.54-67.
JSE Securities Exchange South Africa, available at: http://www.jse.co.za/.(accessed on 10 May 2008).
Kendall, M. G. (1953), “The Analysis of Economic Time Series”, Journal of the Royal Statistical Society, Series A, Vol. 116, pp.11-25.
Kenny, C. J. and Moss, T. J. (1998), “Stock Markets in Africa: Emerging Lions or White Elephants?”, World Development, Vol. 26 No. 5, pp.829-843.
Levine, R. (1997), “Financial Development and Economic Growth: Views and Agenda”, Journal of Economic Literature, Vol. 35, pp.688-726.
Levine, R. and Zervos, S. (1996): “Stock Market Development and Long Run Growth”,World Bank Economic Review, 10(2), pp.323-340.
Lo, A. W. and MacKinlay, A. C. (1988), “Stock Market Prices Do Not Follow Random Walks: Evidence from a Simple Specification Test”, The Review of Financial Studies, Vol. 1 No. 1, pp.41-66.
London Stock Exchange, available at: http://www.londonstockexchange.com/(accessed on 12 May 2008).
Lovatt, D., Boswell, A. and Noor, R. (2008), “A Note on the Predictability of UK Stock Returns”, The European Journal of Finance, Vol. 13, No. 2, pp.159-164.
Lugangwa, E. (2006), “Regional African Stock Exchanges on Agenda, available at: http://www.ibtimes.com/articles/(accessed on 3 May 2008).
Luger, R. (2003), “Exact Non-parametric Tests for a Random Walk with Unknown Drift under Conditional Hetereoscedasticity”, Journal of Econometrics, Vol. 115, pp.259-276.
Lusaka Stock Exchange, available at: http://www.luse.co.zm/ (accessed on 12 May 2008).
Magnusson, M. A. and Wydick, B. (2002), “How Efficient Are Africa’s Emerging Markets?”, The Journal of Development Studies, Vol. 38 No. 4, pp.141-156.
Malawi Stock Exchange, available at: http://www.mse.co.mw/ (accessed on 13 May 2008).
Mauritius Stock Exchange, available at: http://www.stockexchangeofmauritius.com/(accessed on 10 May 2008).
McKinnon, R. I. (1973), Money and Capital in Economic Development, Brookings Institution, Washington DC.
Mlambo, C. and Biekpe, N. (2005): “Thin Trading on African Stock Markets:Implications for Market Efficiency Testing”, Investment Analyst Journal, 61, pp.29-40.
Moin, S. (2007), “New Frontier Markets tempt Investors”, African Review of Business and Technology, Vol. 1, pp.1-7.
Morgan Stanley Capital International and Africa Business Research (2007), “Why Invest In Africa”, A Presentation to the 11th ASEA Conference, Accra Ghana, October 2007.
Mozambique Stock Exchange, available at: http://www.bvm.co.mz/(accessed on 13 May 2008).
Namibia Stock Exchange: http://www.nsx.com.na/
Nairobi Stock Exchange, available at: http://www.nse.co.ke/ (accessed on 13 May 2008).
New York Stock Exchange, available at: http://www.nyse.com/ (accessed on 13 May 2008).
Nigeria Stock Exchange, available at: http://www.nigerianstockexchange.com/exchange_members.jsp (accessed on 10 May 2008).
Ntim, C. G., Opong, K. K. and Danbolt, J. (2007), “An Empirical Re-Examination of the Weak Form Efficient Markets Hypothesis of the Ghana Stock Market Using Variance-Ratios Tests”, African Finance Journal, Vol. 9 No. 2, pp.1-25.
Okealaham, C. C. (2005), “Strategic Alliances and Mergers of Financial Exchanges: The Case of the SADC”, Journal of Southern African Studies, Vol. 31 No. 1, pp.75-93.
Olowe, R. A. (1999), “Weak Form Efficiency of the Nigerian Stock Market: Further Evidence”, African Development Review, Vol. 11 No. 1, pp.54-68.
Parkinson, J. M. (1984), “The Nairobi Stock Exchange in the Context of Development of Kenya”, Savings and Development, Vol. 8 No. 4, pp.363-370.
Samuels, J. M. and Yacout, N. (1981), “Stock Exchange in Developing Countries”,Savings and Development, Vol. 5 No. 4, pp.213-230.
Sao Paulo Stock Exchange, available at: http://www.bov.com (accessed on 14 May 2008).
Savit, R. (1988), “When is Random not Random: An introduction to Chaos in Market Prices”, Journal of Futures Markets, Vol. 8, pp.271-289.
Schumpeter, J. (1911), The Theory of Economic Development, Harvard University Press, Cambridge.
Shanghai Stock Exchange, available at: http://www.sse.com.cn/sseportal/en_us/ps/home.shtml (accessed on13May 2008).
Shaw, E. S. (1973), Financial Deepening in Economic Development, Oxford University Press, New York.
Simons, D. and Laryea, S. A. (2006), “Testing the Efficiency of Selected African Stock Markets”, Finance India, Vol. 20 No. 2, pp.553-571.
Smith, G., Jefferis, K. and Ryoo, H-J. (2002), “African Stock Markets: Multiple Variance Ratio Tests of Random Walks”, Applied Financial Economics, Vol. 12, pp.475-484.
Smith, R. (2003), “Pan-African Stock Exchange Planned”, at available:http://news.bbc.uk/1/hi/business/3163671.stm (accessed on 2 May 2008).
Southern Africa Development Community(2007), “Harmonization Initiative for SADC Stock Exchanges”, Gabrone, Botswana.
Standards and Poors Stock Market Classification, available: http://www2.standardandpoors.com/spf/pdf/index/SP_Emerging_Markets_Indices Methodology_Web.pdf (accessed on 12 May 2008).
Summers, L. (1986), “Does the Stock Market Rationally Reflect Fundamental Values?”, Journal of Finance, Vol. 41, pp.591-601.
Swaziland Stock Exchange, available at: http://www.ssx.org.sz/ (accessed on 12 May 2008).
Ugandan Securities Exchange, available at: http://www.use.or.ug/(accessed on 10 May 2008).
UNDP, (2003), African Stock Markets Handbook, United Nations Development Programme, New York.
Urrutia, J. L. (1995), “Tests of Random Walk and Market Efficiency For Latin American Emerging Equity Markets”, The Journal of Financial Research, Vol. 18 No.3, pp.299-309.
Working, H. (1934), “A Random Difference Series for Use in the Analysis of Time Series”, Journal of the American Statistical Association, Vol. 29, pp.11-24.
World Federation of Exchanges (2008), available at: http://www.worldexchanges.org/WFE/home.asp?(accessed on 10 May 2008).
Wright, J. H. (2000), “Alternative Variance-Ratio Tests Using Ranks and Signs”, Journal of Business and Economic Statistics, Vol. 18, pp.1-9.
Zimbabwe Stock Exchange, available at: http://www.zse.co.zw/(accessed on 12 May 2008).