Is the Nigerian Stock Market Efficient? Pre and Post 2007-2009 Meltdown Analysis

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Abstract

Efficient market hypothesis asserts movements in asset prices are due to significant changes in information. The financial crisis of 2007-2009 originated from subprime mortgages in the United States and affected African countries through local stock markets. This study evaluates the Nigerian stock market efficiency in the pre and post financial meltdown of 2007-2009. GARCH models under three error distributional assumptions were used. The data covers January 2010 to December 2016 divided into pre and post meltdown. Findings indicate that in the pre and post meltdown, the Nigerian stock market is inefficient in the weak form while using the meltdown as event window, the market is efficient in the semi-strong form. It was recommended that prompt release of financial information by quoted firms should be on-line real time and mandatory to discourage rumour and speculative activities. Authority should not only spell out punishments but should be strict and firm about it.

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  • 1. Adelegan O.J. (2003) Capital market efficiency and the effects of dividend announcements on share prices in Nigeria African Development Review 15(2-3) pp. 218-236.

  • 2. Adelegan O.J. (2004) How efficient is the Nigerian stock market: Further evidence African Review of Money Finance and Banking 5(3) pp. 143-165.

  • 3. Adelegan O.J. (2009) Price reactions to dividend announcements on the Nigerian stock market African Economic Research Consortium Nairobi AERC Research Paper 188.

  • 4. Afego P. (2012) Weak form efficiency of the Nigerian stock market: An empirical analysis (1984 - 2009) International Journal of Economics and Financial Issues. 2(3) pp. 340-347.

  • 5. Agwuegbo S.O.N. Adewole A.P. & Maduegbuna A.N. (2010) A random walk model for stock market prices Journal of Mathematics and Statistics 6(3) pp. 342-346.

  • 6. Ahrony J. & Swary I. (1980) Quarterly dividend and earnings announcements and stockholders’ returns: An empirical analysis Journal of Finance 35 pp. 1-12.

  • 7. Ajao M.G. & Osayuwu R. (2012) Testing the weak form of efficient market hypothesis in Nigerian capital market Accounting and Finance Research 1(1) pp. 169-179.

  • 8. Ajibola A. Prince N.C. & Lenee T.L. (2014) Detecting market anomalies: Do evidences hold in Nigeria? International Review of Management and Business Research 3(2) pp. 1128-1138.

  • 9. Alam M.I. Tanweer H. & Palani-Rajan K. (1999) An application of varianceratio test to five Asian stock markets Review of Pacific Basin Financial Markets and Policies 2(3) pp. 301-315.

  • 10. Arunma O. (2010) Testimony on the global financial crisis and financial reform in Nigeria: A capital market perspective A paper presented before the United States House of Representatives Committee on Financial Services Sub-Committee on InternationalMonetary Policy and trade.

  • 11. Asquith P. & Mullins D.W. (1983) The impact of initiating dividend payments on shareholders’ wealth Journal of Business 56 pp. 77-96.

  • 12. Atoi N.V. (2014) Testing volatility in Nigeria stock market using GARCH models CBN Journal of Applied Statistics 5(2) pp. 65-93.

  • 13. Ayadi F.O. (1984) The random walk hypothesis and the behaviour of share prices in Nigeria The Nigerian Journal of Economic and Social Studies 26(1) pp. 57-71.

  • 14. Ayuba S. (2011) The impact of the global financial market on the Nigerian stock market (An Unpublished M.Sc. Project) Department of Economics Ahmadu Bello University Zaria.

  • 15. Azeez B.A. & Sulaiman L.A. (2012) Capital market efficiency: A test of the strong form in Nigeria Australian Journal of Business and Management Research 2(3) pp. 12-18.

  • 16. Bailey W. Kumar A. & Ng D. (2011) Behavioral biases of mutual fund investors Journal of Financial Economics 102(1) pp. 1–27.

  • 17. Baker H.K. & Nofsinger J.R. (2010) Behavioral finance: Investors corporations and markets New Jersey: John Wiley & Sons.

  • 18. Ball R. (1990) What do we know about market efficiency? Unpublished manuscript William E. Simon Graduate School of Business Administration University of Rochester

  • 19. Banz R.W. (1981) The relationship between return and market value of common stock Journal of Financial Economics 9(1) pp. 3-18.

  • 20. Basu S. (1977) The investment performance of common stocks in relation to their price to earnings ratio: A test of the efficient markets hypothesis Journal of Finance 32(3) pp. 663-682.

  • 21. Binder J.J. (1985) Measuring the effects of regulation with stock price data Rand Journal of Economics 16 pp. 167-182.

  • 22. Chang K. & Ting K. (2000) A variance ratio test of the random walk hypothesis for Taiwan’s stock market Applied Financial Economics 10(5) pp. 525-532.

  • 23. Charest G. (1978) Dividend information stock returns and market efficiency-II Journal of Financial Economics 6 pp. 297-330.

  • 24. Cheung K. & Coutts J.A. (2001) A note on weak form market efficiency in security prices: Evidence from the Hong Kong Stock Exchange Applied Economics Letters 8 pp. 407-410.

  • 25. Chow S.C. Hui Y. Vieito J.P. & ZhenZhen Zhu Z. (2016) Market liberalizations and efficiency in Latin America. Studies in Economics and Finance 33(4) pp. 553-575.

  • 26. Claessens S. & Kose M.A. (2013) Financial crises: Explanations types and implications IMF Working Paper WP/13/28.

  • 27. Dockery E. & Vergari F. (1997) Testing the random walk hypothesis: Evidence for the Budapest Stock Exchange Applied Economics Letters 4 pp. 627-629.

  • 28. Easterbrook F.H. (1984) Two agency-cost explanations of dividends American Economic Review 74 pp. 650-659.

  • 29. Ekechi A.O. (2002) The Behaviour of stock prices on the Nigerian stock exchange: Further evidence First Bank Quarterly Review 1 pp. 5-16.

  • 30. Eleke-Aboagye P.Q. & Opoku E. (2013) The effect of earnings announcement on share prices in Ghana: A study of Ghana stock exchange Research Journal of Finance and Accounting 4(17) pp. 166-186.

  • 31. Emenike K.O. (2008) Efficiency across time: Evidence from the Nigerian stock exchange Munich Personal RePEc Archive Paper No. 22901.

  • 32. Engle R.F. (1982) Autoregressive conditional heteroskedasticity with estimates of the variance of United Kingdom inflation Econometrica 50(4) pp. 987-1007.

  • 33. Evanoff D.D. Kaufman G.G. & Malliaris A.G. (2012) Asset price bubbles: What are the causes consequences and public policy options? Chicago Fed Letter Number 304.

  • 34. Ezike J.E. (2002) Essentials of corporate financial management Lagos: Jaylycent communications.

  • 35. Fama E.F. & French K.R. (1996) Multifactor explanations of asset pricing anomalies Journal of Finance 51(1) pp. 55-84.

  • 36. Fama E.F. (1965) The behaviour of stock market prices Journal of Business 38 pp. 34-105.

  • 37. Fama E.F. Fisher I. Jensen M. & Roll R. (1969) The adjustment of stock prices to new information International Economic Review 10(1) pp. 1-21.

  • 38. Farhi M. & Cintra M.A.M. (2009) The financial crisis and the global shadow banking system Regulatory Review (Online).

  • 39. Fox J. (2009) The myth of the rational market: A history of risk reward and delusion on wall street New York: Harper Collins.

  • 40. French K.R. (1980) Stock returns and the weekend effect Journal of Financial Economics 8 pp. 55-69.

  • 41. Gilson R.J. & Kraakman R. (2014) Market efficiency after the financial crisis: It’s still a matter of information costs Virginia Law Review 100 pp. 313-275.

  • 42. Gimba V.K. (2012) Testing the weak-form efficiency market hypothesis: Evidence from Nigerian stock market CBN Journal of Applied Statistics 3(1) pp. 117-136.

  • 43. Grieb T. & Reyes M.G. (1999) Random walk tests for Latin American equity indexes and individual firms Journal of Financial Research 22(4) pp. 371-383.

  • 44. Gust M. (2014) Consequences and influences of the economic crisis on the efficiency of Romanian enterprises Studia Universitatis “Vasile Goldiş” Arad Economics Series 24(3) pp. 37-46.

  • 45. Inegbedion H.E. (2009) Efficient market hypothesis and the Nigerian capital market (Unpublished Masters Thesis) University of Benin Nigeria.

  • 46. Jensen M.C. & Ruback R.S. (1983) The market for corporate control: The scientific evidence Journal of Financial Economics 11 pp. 5-50.

  • 47. Jensen M.C. & Warner J.B. (1988) The distribution of power among corporate managers shareholders and directors Journal of Financial Economics 20 pp. 3-24.

  • 48. Jensen M.C. (1986) The agency costs of free cash flows corporate finance and takeovers American Economic Review 76 pp. 323-329.

  • 49. Kaberuka D. (2009) Start this engine: Africa’s policymakers should prepare for global recovery by priming their private sectors Finance and Development 46(2) pp. 54–55.

  • 50. Lima E.J. & Tabak B.M. (2004) Tests of the random walk hypothesis for equity markets: Evidence from China Hong Kong and Singapore Applied Economics Letters 11 pp. 255-258.

  • 51. Lo A.W. & MacKinlay A.C. (1990) Data-snooping biases in tests of financial asset pricing models Review of Financial Studies 3(3) pp. 431-467.

  • 52. Lo A.W. & MacKinlay A.C. (1988) Stock market prices do not follow random walks: Evidence from a simple specification test Review of Financial Studies 1(1) pp. 41–66.

  • 53. Lo A.W. (2005) Reconciling efficient markets with behavioral finance: The adaptive markets hypothesis The Journal of Investment Consulting 7(2) pp. 21-44.

  • 54. Malkiel B.G. (2003) The efficient market hypothesis and its critics The Journal of Economic Perspectives 17(1) pp. 59-82.

  • 55. Manasseh C.O. (2014) Efficient Market Hypothesis (EMH) and Nigerian capital market: An analysis of bonus issues and dividend Announcement (Doctoral thesis University of Nigeria Nsukka).

  • 56. Manasseh C.O. Ozuzu C.K. & Ogbuabo J.E. (2016) Semi strong form efficiency test of the Nigerian stock market: Evidence from event study analysis of bonus issues International Journal of Economics and Financial Issues 6(4) pp. 1474-1490.

  • 57. McLindon M.P. (1996) Privatization and capital market development: Strategies to promote economic growth United States of America: Greenwood Publishing Group.

  • 58. Miller M.H. & Rock K. (1985) Dividend policy under asymmetric information Journal of Finance 40 pp. 1031-1052.

  • 59. Mukora M.Y.W. (2014) The effect of dividend announcement on stock returns of firms listed at the Nairobi Securities Exchange (Masters thesis University of Nairobi Kenya).

  • 60. Njiforti P. (2015) Impact of the 2007/2008 global financial crisis on the stock market in Nigeria CBN Journal of Applied Statistics 6(1a) pp. 49-68.

  • 61. Nneji I. (2013) Efficiency of the Nigerian capital market: An empirical analysis Research Journal of Finance and Accounting 4(4) pp. 69-77.

  • 62. Nwidobie B.M. (2014) The random walk theory: An empirical test in the Nigerian capital market. Asian Economic and Financial Review 4(12) pp. 1840-1848.

  • 63. Nwidobie B.M. (2015) Capital market efficiency: The Nigerian experience Journal of Finance and Investment Analysis 4(2) pp. 61-67.

  • 64. Nwosa P.I. & Oseni I.O. (2011) Efficient market hypothesis and Nigerian stock market Research Journal of Finance and Accounting 2(12) pp. 38-46.

  • 65. Obayagbona J. & Igbinosa S.O. (2015) Test of random walk hypothesis in the Nigerian stock market Current Research Journal of Social Sciences 7(2) pp. 27-36.

  • 66. Ogege S. & Mojekwu J.N. (2013) Econometric investigation of the random walk hypothesis in the Nigerian stock market Journal of Emerging Issues in Economics Finance and Banking 1(5) pp. 381-400.

  • 67. Ogege S. & Udoka C.O. (2012) The efficiency of the Nigerian stock exchange: A theoretical and empirical analysis Indian Journal of Finance 6(9) pp. 13-20.

  • 68. Ogundina J.A. & Omah I. (2013) Test of capital market efficiency theory in the Nigerian capital market Research Journal of Finance and Accounting 4(1) pp. 120-123.

  • 69. Oke M.O. & Azeez B.A. (2012) A test of strong-form efficiency of the Nigerian capital market Business Systems Review 1(1) pp. 10-26.

  • 70. Okpara G.C. (2010) Analysis of the weak-form efficiency of the Nigerian stock market: Further evidence from GARCH model The International Journal of Applied Economics and Finance 4(2) pp. 62-66.

  • 71. Olowe R.A. (1996) Semi-strong information efficiency of the Nigerian stock market: Evidence from stock splits (Unpublished Doctoral Thesis) University of Lagos Nigeria.

  • 72. Olowe R.A. (1999) Weak form efficiency of the Nigerian stock market: Further evidence African Development Review 11(1) pp. 54-68.

  • 73. Oludoyi S.B. (1998) Capital market efficiency and the effects of earnings announcements on share prices in Nigeria (Unpublished Doctoral Thesis) University of Ibadan Nigeria.

  • 74. Osakwe P.N. (2010) The emerging-market economies in the face of the global financial crisis in S. Dullien D. J. Kotte A. Márquez & J. Priewe (Ed.) The financial and economic crisis of 2008-2009 and developing countries pp.53-72 New York and Geneva: United Nations Publication.

  • 75. Osazevbaru H.O. (2014) Measuring Nigerian stock market volatility Singaporean Journal of Business Economics and Management Studies 2(8) pp. 1-14.

  • 76. Osei K.A. (2002) Asset pricing and information efficiency of the Ghana stock market African Economic Research Consortium Paper 115.

  • 77. Prates D.M. & Cintra M.A.M. (2010) Africa and the global financial and economic crisis: Impacts responses and opportunities in S. Dullien D.J. Kotte A. Márquez & J. Priewe (Ed.) The financial and economic crisis of 2008-2009 and developing countries pp. 203-222 New York and Geneva: United Nations Publication.

  • 78. Rahman S. Simon H.M. & Hossain M. (2016) An empirical analysis of weak form market efficiency: Evidence from Chittagong stock exchange (CSE) of Bangladesh Journal of Statistics Applications & Probability 5(3) pp. 535-542.

  • 79. Rapuluchukwu E.U. (2010) The efficient market hypothesis: Realities from the Nigerian stock market Global Journal of Finance and Management 2(2) pp. 321-331.

  • 80. Reinganum M.R. (1981) Misspecification of capital asset pricing: Empirical anomalies based on earnings’ yields and values Journal Financial Economics 9(1) pp. 19-46.

  • 81. Samuels J.M. & Yacout N. (1981) Stock exchanges in developing countries Savings and development 5(4) pp. 217-230.

  • 82. Samuelson P.A. (1965) Proof that properly anticipated prices fluctuate randomly Industrial Management Review 6(2) pp. 41-49.

  • 83. Santomero A. (1991) Money supply announcements: A retrospective Journal of Economics and Business 43 pp. 1-23.

  • 84. Schwert G.W. (2002) Anomalies in market efficiency The Bradley Policy Research Center.

  • 85. Shefrin H. (2007) Behavioral finance: biases mean-variance returns and risk premiums CFA Institute Conference Proceedings 24(2) pp. 4–12.

  • 86. Shiller R.J. (2000) Irrational exuberance New Jersey: Princeton University Press.

  • 87. Simon H. (1957) A behavioral model of rational choice in models of man social and rational: Mathematical essays on rational human behavior in a social setting New York: John Wiley & Sons.

  • 88. Smith C.W. Jr. (1986) Investment banking and the capital acquisition process Journal of Financial Economics 15 pp. 3-29.

  • 89. Sullivan A. & Steven M.S. (2003) Economics: Principles in action Upper Saddle River: Pearson Prentice Hall.

  • 90. Thaler R.H. (1993) Advances in behavioral finance New York: Russell Sage Foundation.

  • 91. Thaler R.H. (2005) Advances in behavioral finance volume II (Roundtable series in behavioral economics) Princeton: Princeton University Press.

  • 92. Udoka C.O. (2012) Weak-form market efficiency: Dynamic effects of information on the Nigerian stock market Interdisciplinary Journal of Contemporary Research in Business 4(7) pp. 417-429.

  • 93. Ujunwa A. Salami O.P. & Umar H.A. (2011) The global financial crisis: Realities and implications for the Nigerian capital market American Journal of Social and Management Sciences 2(3) pp. 341-347.

  • 94. Vitali F. & Mollah S. (2010) Stock market efficiency in Africa: Evidence from random walk hypothesis Mid-West Finance Association Annual Meeting West Chicago River North.

  • 95. Yadirichukwu E. & Ogochukwu O.B. (2014) Evaluation of the weak form of efficient market hypothesis: Empirical evidence from Nigeria International Journal of Development and Sustainability 3(5) pp. 1199-1244.