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Conducting event studies on a small stock exchange

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Author Info
Bartholdy, Jan () (Department of Business Studies)
Olson, Dennis () (American University of Sharjah)
Peare, Paula () (Department of Business Studies)

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Abstract

This paper analyses whether it is possible to perform an event study on a small stock exchange with thinly trade stocks. The main conclusion is that event studies can be performed provided that certain adjustments are made. First, a minimum of 25 events appears necessary to obtain acceptable size and power in statistical tests. Second, trade to trade returns should be used. Third, one should not expect to consistently detect abnormal performance of less than about 1% (or perhaps even 2%), unless the sample contains primarily thickly traded stocks. Fourth, nonparametric tests are generally preferable to parametric tests of abnormal performance. Fifth, researchers should present separate results for thickly and thinly traded stock groups. Finally, when nonnormality, event induced variance, unknown event day, and problems of very thin trading are all considered simultaneously, no one test statistic or type of test statistic dominates the others

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Publisher Info
Paper provided by University of Aarhus, Aarhus School of Business, Department of Business Studies in its series Finance Research Group Working Papers with number F-2006-03.

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Length: 39 pages
Date of creation: 25 Apr 2006
Date of revision:
Handle: RePEc:hhb:aarbfi:2006-03

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Postal: The Aarhus School of Business, Fuglesangs Allé 4, DK-8210 Aarhus V, Denmark
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Related research
Keywords: Event studies; Thin trading;

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Brown, Stephen J. & Warner, Jerold B., 1985. "Using daily stock returns : The case of event studies," Journal of Financial Economics, Elsevier, vol. 14(1), pages 3-31, March. [Downloadable!] (restricted)
  2. Brown, Stephen J. & Warner, Jerold B., 1980. "Measuring security price performance," Journal of Financial Economics, Elsevier, vol. 8(3), pages 205-258, September. [Downloadable!] (restricted)
  3. John D. Lyon & Brad M. Barber & Chih-Ling Tsai, 1999. "Improved Methods for Tests of Long-Run Abnormal Stock Returns," Journal of Finance, American Finance Association, vol. 54(1), pages 165-201, 02. [Downloadable!] (restricted)
  4. Heinkel, Robert & Kraus, Alan, 1988. "Measuring Event Impacts in Thinly Traded Stocks," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 23(01), pages 71-88, March. [Downloadable!]
  5. Corrado, Charles J. & Zivney, Terry L., 1992. "The Specification and Power of the Sign Test in Event Study Hypothesis Tests Using Daily Stock Returns," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 27(03), pages 465-478, September. [Downloadable!]
  6. Boehmer, Ekkehart & Masumeci, Jim & Poulsen, Annette B., 1991. "Event-study methodology under conditions of event-induced variance," Journal of Financial Economics, Elsevier, vol. 30(2), pages 253-272, December. [Downloadable!] (restricted)
  7. Fama, Eugene F, et al, 1969. "The Adjustment of Stock Prices to New Information," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 10(1), pages 1-21, February. [Downloadable!] (restricted)
  8. Campbell, Cynthia J. & Wesley, Charles E., 1993. "Measuring security price performance using daily NASDAQ returns," Journal of Financial Economics, Elsevier, vol. 33(1), pages 73-92, February. [Downloadable!] (restricted)
  9. Corrado, Charles J., 1989. "A nonparametric test for abnormal security-price performance in event studies," Journal of Financial Economics, Elsevier, vol. 23(2), pages 385-395, August. [Downloadable!] (restricted)
  10. Salinger, Michael, 1992. "Standard Errors in Event Studies," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 27(01), pages 39-53, March. [Downloadable!]
  11. Maynes, Elizabeth & Rumsey, John, 1993. "Conducting event studies with thinly traded stocks," Journal of Banking & Finance, Elsevier, vol. 17(1), pages 145-157, February. [Downloadable!] (restricted)
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Jørgensen, Peter Løchte & De Giovanni, Domenico, 2008. "Time Charters with Purchase Options in Shipping: Valuation and Risk Management," Finance Research Group Working Papers F-2008-05, University of Aarhus, Aarhus School of Business, Department of Business Studies. [Downloadable!]
  2. Høg, Esben, 2008. "Volatility and realized quadratic variation of differenced returns : A wavelet method approach," Finance Research Group Working Papers F-2008-06, University of Aarhus, Aarhus School of Business, Department of Business Studies. [Downloadable!]
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