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Detecting Abnormal Bid-Ask Spread: A Comparison of Event Study Methods

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  • Affleck-Graves, John
  • Callahan, Carolyn M
  • Ramanan, Ramachandran

Abstract

This study examines empirical issues associated with the use of bid-ask spreads in event studies. The simulation results indicate that the distribution of average standardized abnormal spread shows little deviation from normality. Simulation results also indicate that the widely used percent spread metric results in test statistics with low power. In contrast, use of a standardized raw spread metric and a simple mean-adjusted expectation model results in well specified and reasonably powerful Patell and Brown-Warner type test statistics. As the abnormal spread series is characterized by high first order serial correlation, it is important to adjust for this serial correlation when using multi-day event windows. Copyright 2000 by Kluwer Academic Publishers

Suggested Citation

  • Affleck-Graves, John & Callahan, Carolyn M & Ramanan, Ramachandran, 2000. "Detecting Abnormal Bid-Ask Spread: A Comparison of Event Study Methods," Review of Quantitative Finance and Accounting, Springer, vol. 14(1), pages 45-65, January.
    • Handle: RePEc:kap:rqfnac:v:14:y:2000:i:1:p:45-65
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    Cited by:

    1. Rosati, Pierangelo & Cummins, Mark & Deeney, Peter & Gogolin, Fabian & van der Werff, Lisa & Lynn, Theo, 2017. "The effect of data breach announcements beyond the stock price: Empirical evidence on market activity," International Review of Financial Analysis, Elsevier, vol. 49(C), pages 146-154.
    2. Devos, Erik & Hao, Wei & Prevost, Andrew K. & Wongchoti, Udomsak, 2015. "Stock return synchronicity and the market response to analyst recommendation revisions," Journal of Banking & Finance, Elsevier, vol. 58(C), pages 376-389.
    3. Alexis Cellier & Pierre Chollet & Jean†François Gajewski, 2016. "Do Investors Trade around Social Rating Announcements?," European Financial Management, European Financial Management Association, vol. 22(3), pages 484-515, June.
    4. Chun-Teck Lye & Tuan-Hock Ng & Kwee-Pheng Lim & Chin-Yee Gan, 2020. "Investor protection and market reaction to unusual market activity replies," International Journal of Emerging Markets, Emerald Group Publishing Limited, vol. 16(8), pages 2034-2069, July.
    5. Corrado, Charles J. & Truong, Cameron, 2008. "Conducting event studies with Asia-Pacific security market data," Pacific-Basin Finance Journal, Elsevier, vol. 16(5), pages 493-521, November.
    6. Sabet, Amir H. & Heaney, Richard, 2015. "Bid-ask spread, information asymmetry and acquisition of oil and gas assets," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 37(C), pages 77-84.

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