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Short-Term Overreaction to Specific Events: Evidence from an Emerging Market

Author

Listed:
  • Sabri Boubaker

    (Groupe ESC Troyes en Champagne, IRG - Institut de Recherche en Gestion - UPEM - Université Paris-Est Marne-la-Vallée - UPEC UP12 - Université Paris-Est Créteil Val-de-Marne - Paris 12)

  • Hisham Farag
  • Duc Khuong Nguyen

    (IPAG Business School)

Abstract

This paper investigates the short-term overreaction to specific events and whether stock prices are predictable in the Egyptian stock exchange (EGX). We find evidence of the short-term overreaction in the EGX. Losers ("bad news" portfolios) significantly outperform winners ("good news" portfolios) and investors can earn abnormal return by selling the winners and buying losers. Terrorist attacks have negative and significant abnormal returns for three days post event followed by price reversals on day four post event. Whereas, the tensions in the Middle East region have a negative and significant abnormal returns on event day followed by price reversals on day one post event. Moreover, the formation of a new government has no effect on the average abnormal returns post event in the EGX. The results also show that small firms tend to have greater price reversals compared to large firms. Overall, our results provide evidence of the leakage of information in the EGX.

Suggested Citation

  • Sabri Boubaker & Hisham Farag & Duc Khuong Nguyen, 2015. "Short-Term Overreaction to Specific Events: Evidence from an Emerging Market," Post-Print hal-01158095, HAL.
    • Handle: RePEc:hal:journl:hal-01158095
    DOI: 10.1016/j.ribaf.2014.10.002
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    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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