Testing the weak-form market efficiency and the day of the week effects of some African countries.

Batuo Enowbi, Michael and Guidi, Francesco and Mlambo, Kupukile (2009): Testing the weak-form market efficiency and the day of the week effects of some African countries.

Abstract

The aims of this work are twofold. On the one hand, it aims to find evidence supporting the presence of the weak form efficiency of several emerging African stock markets by using both parametric as well as non parametric tests. The results indicate that none of the markets are characterised by random walks with the exception of the South African stock market. On the other hand, this study aims to detect the presence of the day of the week effects of these African stock markets. Results show the existence of day of the week effects, that is the typical negative Monday and Friday positive effects in several stock markets.

• Item Type: MPRA Paper
• Language: English
• Keywords: African stock markets, random walk hypothesis, day of the week effects
• Subjects: G - Financial Economics > G1 - General Financial Markets > G14 - Information and Market Efficiency ; Event Studies ; Insider Trading; O - Economic Development, Innovation, Technological Change, and Growth > O5 - Economywide Country Studies > O55 - Africa; C - Mathematical and Quantitative Methods > C1 - Econometric and Statistical Methods and Methodology: General > C12 - Hypothesis Testing: General; G - Financial Economics > G1 - General Financial Markets > G15 - International Financial Markets

References

Abraham A., Seyyed, F.J. and S.A., Alsakran (2002): “Testing the Random Walk Behaviour and Efficiency of the Gulf Stock Markets”, The Financial Review, 37, pp. 469-480.

Agrawal, A. and K. Tandon (1994): “Anomalies or illusions? Evidence from stock markets in eighteen countries”, Journal of International Money and Finance, 13, pp. 83-106.

Al-Khazali O.M., Ding, D.K. and C.S., Pyun (2007): “A New Variance Ratio Test of Random Walk in Emerging Markets: A Revisit”, The Financial Review, 42, pp. 303-317.

Al-Loughani, N. and Chappell, D. (2001): “Modelling the day-of-the-week effect in the Kuwait Stock Exchange: a nonlinear GARCH representation”, Applied Financial Economics, 11, pp. 353-359.

Alagidede, P. (2008): “Day of the week seasonality in African stock markets”, Applied Financial Economics Letters, 4, pp. 115-120.

Alexakis, P. and Xanthakis, M. (1995): “Day-of-the-week effect on the Greek stock market”, Applied Financial Economics, 5, pp. 43-50.

Appiah-Kusi, J. and K. Menayah (2002): “Return predictability in African stock markets”, Review of Financial Economics, 12, pp. 247-270.

Balaban, E. (1995): “Day-of-the week effects: new evidence from an emerging stock market”, Applied Economics Letters, 2, pp. 139-143.

Beveridge, S. and Nelson, C.R. (1981): “A new approach to decomposition of economic time series into permanent and transitory components with particular attention to measurement of the business cycle”, Journal of Monetary Economics, 7, pp. 151-174.

Board, J.L. and Sutcliffe, C.M. (1988): “The Weekend Effect in UK Stock Market Returns”, Journal of Business, Finance & Accounting, 15, pp. 199-213.

Bollerslev, T. (1987): “A conditional heteroscedastic time series model for speculative prices and rates of return”, Review of Economics and Statistics, 69, pp. 542-547.

Borges, M.R. (2007): “Random Walk Tests for the Lisbon Stock Market”, School of Economics and Management, Technical University of Lisbon, Discussion paper WP 014, pp. 1-18.

Choudhry, T. (2000): “Day of the week effect in emerging Asian stock markets: evidence from the GARCH model”, Applied Financial Economics, 10, pp. 235-242.

Coutts, J.A., Kaplanidis, C. and Roberts, J. (2000): “Security price anomalies in an emerging market: the case of the Athens Stock Exchange”, Applied Financial Economics, 10, pp. 561-571.

Chow, K.V. and Denning, K.C. (1993): “A simple multiple variance ratio test”, Journal of Econometrics, 58, pp. 385-401.

Diebold, F.X. and Rudebusch, G.D. (1991): “On the Power of Dickey-Fuller tests against fractional alternatives”, Economic Letters, 35, pp. 155-160.

Fama, E.F. (1970): “Reply to Efficient Capital Market: A Review of Theory and Empirical Work”, Journal of Finance, 25(1), pp. 383-417.

Foster D., Viswanathan S. (1990). “A theory of interday variations in volumes, varaince and trading costs in securities market”, Review of Financial Studies, 3, 593-624.

French, K. and Roll, R. (1986): “Stock return varainces: the arrival of information and the reaction of traders”, Journal of Financial Economics, 17, pp. 5-26.

Geweke, J. and Porter-Hudak, S. (1983): “The estimation and application of long-memory time series models”, Journal of Time Series Analysis, 4, 221-238.

Islam, A. and Khaled, M. (2005): “Tests of Weak-Form Efficiency of the Dhaka Stock Exchange”, Journal of Business Finance & Accounting, 32(7), pp. 1613-1624.

Jefferis, K and Smith, G. (2005): “The Changing Efficiency of African Stock Markets, South African Journal of Economics, 73(1), 54-67.

Karolyi, A.G. (1995): “A multivariate GARCH model of international transmission of stock returns and volatility: The case of the United States and Canada”, Journal of Business and Economics Statistics, 13, 11-25.

Keim, D. and Stambaugh, R. (1984): “A further investigation of the weekend effect in stock returns” Journal of Finance 39, pp. 819-835.

Kiymaz, H. and Berument, H. (2003): “The day of the week effect on stock market volatility and volume: International evidence”, Review of Financial Economics, 12, pp. 363-380.

Kwiatkowski, D., Phillips, P.C.B., Schmidt, P. and Shin, Y. (1992): “ Testing the Null Hypothesis of Stationarity Against the Alternative of a Unit Root: How Sure Are We That Economic Time Series Have a Unit Root?”, Journal of Econometrics, 54, pp. 159-178.

Lagoarde-Segot, T. and Lucey, B.M. (2008): “Efficiency in Emerging Markets – Evidence from MENA region”, International Financial Markets, Institutions and Money, 18, pp. 94-105.

Lo, A. W. and MacKinlay, C. (1988): “Stock market prices do not follow random walks: Evidence from a simple specification test”, Review of Financial Studies, 1, pp. 41-66

Marashdeh, H. and Shrestha, M.B. (2008): “Efficiency in Emerging Markets – Evidence from the Emirates Securities Market”, European Journal of Economics, Finance and Administrative Sciences, 12, pp. 143-150.

Nelson, D. (1990): “Conditional Heteroskedasticity in Asset Returns: A New Approach”, Econometrica, 59, pp. 347-370.

Ojah, K. and Karemera, D. (1999): “Random Walks and Market Efficiency Tests of Latin American Emerging Equity Markets: A Revisit”, The Financial Review, 34, pp. 57-72.

Olowe R.A. (2002). Weak Form Efficiency of the Nigerian Stock Market: Further Evidence, African Development Review, 11(1), 54-68.

Sowell, F. (1990): “The fractional unit root distribution”, Econometrica, 58, pp. 195-505.

Tang, G.Y.N. and Kwok, K. (1997): “Day of the Week Effect in International Portfolio Diversification: January vs Non-January”, Japan World Economy, 1997, 9, pp. 335-352.

Wong, K.A. (1995): “Is there an intra-month effect on stock returns in developing stock markets”, Applied Financial Economics, 5, pp. 285-289.

Worthington, A.C. and Higgs, H. (2003): “Weak-Form Market Efficiency in Asian Emerging and Developed Equity Markets: Comparative Tests of Random Walk Behaviour”, University of Wollongong, Working Paper, N° 3, 1-12.

Wright, J.H. (2000): “Alternative Variance-Ratio Tests Using Ranks and Signs”, American Statistical Association, Journal of Business & Economics Statistics, 18, pp. 1-9.