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A Generalized Method for Detecting Abnormal Returns and Changes in Systematic Risk

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  • Cyree, Ken B
  • DeGennaro, Ramon P

Abstract

We generalize traditional event-study techniques to allow for event-induced parameter shifts, shifting variances, and firm-specific event periods. Our method, which nests traditional methods, also permits systematic risk to change gradually during the event period and exit the period at higher or lower levels. We use our approach to study 123 banks that acquired other institutions between 1989 and 1995. We find a significant change in the systematic risk of the acquiring firms, significant ARCH effects, and an event period that ends before the date of the announcement. None of these results is detectable using conventional methods. Copyright 2002 by Kluwer Academic Publishers

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  • Cyree, Ken B & DeGennaro, Ramon P, 2002. "A Generalized Method for Detecting Abnormal Returns and Changes in Systematic Risk," Review of Quantitative Finance and Accounting, Springer, vol. 19(4), pages 399-416, December.
    • Handle: RePEc:kap:rqfnac:v:19:y:2002:i:4:p:399-416
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    3. Farruggio, Christian & Michalak, Tobias C. & Uhde, Andre, 2013. "The light and dark side of TARP," Journal of Banking & Finance, Elsevier, vol. 37(7), pages 2586-2604.
    4. Shuxing Yin & Khelifa Mazouz & Abdelhafid Benamraoui & Brahim Saadouni, 2018. "Stock price reaction to profit warnings: the role of time-varying betas," Review of Quantitative Finance and Accounting, Springer, vol. 50(1), pages 67-93, January.
    5. Qingjun Zhang & Yiding Ou & Rong Chen, 2023. "Digitalization and stability in banking sector: a systemic risk perspective," Risk Management, Palgrave Macmillan, vol. 25(2), pages 1-29, June.
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    8. Uhde, André & Michalak, Tobias C., 2010. "Securitization and systematic risk in European banking: Empirical evidence," Journal of Banking & Finance, Elsevier, vol. 34(12), pages 3061-3077, December.
    9. Thorsten Lübbers, 2009. "Is Cartelisation Profitable? A Case Study of the Rhenish Westphalian Coal Syndicate, 1893-1913," Discussion Paper Series of the Max Planck Institute for Research on Collective Goods 2009_09, Max Planck Institute for Research on Collective Goods.

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