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Stock Price Response to Earnings Announcements: Evidence From the Nigerian Stock Market

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  • Pyemo N. Afego

Abstract

The author examines the stock market reaction to annual earnings information releases using data for a sample of firms on the Nigerian Stock Exchange. Using the event study method, the author found that the magnitude of the cumulative abnormal returns is dominated by significant reactions 20 days before the earnings release date, which suggests that a portion of the market reaction may be due to private acquisition and, possibly, abuse of information by insiders. The persistent downward drift of the cumulative abnormal returns, 20 days after the announcement, is inconsistent with the efficient markets hypothesis.

Suggested Citation

  • Pyemo N. Afego, 2013. "Stock Price Response to Earnings Announcements: Evidence From the Nigerian Stock Market," Journal of African Business, Taylor & Francis Journals, vol. 14(3), pages 141-149, December.
    • Handle: RePEc:taf:wjabxx:v:14:y:2013:i:3:p:141-149
    DOI: 10.1080/15228916.2013.844008
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    Cited by:

    1. Ibrahim Mohammed & Chioma Nwafor, 2014. "Stock Market Consequences of the Suspension of the Central Bank of Nigeria’s Governor," Managing Global Transitions, University of Primorska, Faculty of Management Koper, vol. 12(4 (Winter), pages 371-394.
    2. repec:grz:wpsses:2020-04 is not listed on IDEAS
    3. Yusuf Musa Muhammad & Kabiru Umar, 2016. "Corporate Crime Announcement and Share Prices of Deposit Money Banks in Nigeria," International Journal of Management Sciences, Research Academy of Social Sciences, vol. 7(6), pages 296-301.
    4. Malthus Timothy Ekpe & Rosemary Obiageri Obasi & Sadiq Rabiu Abdullahi & Umar Aliyu Mustapha & Norfadzilah Rashid, 2020. "Earnings Surprises and Stock Price Reactions of Quoted Companies in Nigeria," International Journal of Financial Research, International Journal of Financial Research, Sciedu Press, vol. 11(4), pages 306-315, July.
    5. Edward A. E. Jones & Anthony K. Kyiu & Hao Li, 2021. "Earnings informativeness and trading frequency: Evidence from African markets," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 26(1), pages 1064-1086, January.
    6. Pius V.C. Okoye & Jane F.N. Okoye & Raymond A. Ezejiofor, 2014. "Impact of the IFRS Adoption on Stock Market Movement in Nigerian Corporate Organization," International Journal of Academic Research in Business and Social Sciences, Human Resource Management Academic Research Society, International Journal of Academic Research in Business and Social Sciences, vol. 4(9), pages 202-218, September.
    7. Fink, Josef, 2021. "A review of the Post-Earnings-Announcement Drift," Journal of Behavioral and Experimental Finance, Elsevier, vol. 29(C).

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    More about this item

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)

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