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The effect of mergers on implied volatility of equity options

Author

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  • Geppert, Gero
  • Kamerschen, David R.

Abstract

This paper uses a sample of 25 large mergers from 1996 to 2004 to study the effect of mergers on the implied volatilities of equity options. The results indicate a statistically significant increase in volatility beyond the amount predicted if the transaction were effectively nothing more than a portfolio combination of the target and acquirer. The disparity suggests that, at least for the first 18Â months after the transaction becomes effective, market participants expect mergers to increase risk. Integration risk and uncertainty about the extent to which efficiency gains and greater market power are realized are possible explanations for the discrepancy.

Suggested Citation

  • Geppert, Gero & Kamerschen, David R., 2008. "The effect of mergers on implied volatility of equity options," International Review of Financial Analysis, Elsevier, vol. 17(2), pages 330-344.
    • Handle: RePEc:eee:finana:v:17:y:2008:i:2:p:330-344
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    3. Soniya Mohil & Reena Nayyar & Archana Patro, 2020. "When is informed trading more prevalent?—An examination of options trading around Indian M&A announcements," Journal of Futures Markets, John Wiley & Sons, Ltd., vol. 40(6), pages 1011-1029, June.
    4. Austin, Rebekah E. & Dunham, Lee M., 2022. "Do FinTech acquisitions improve the operating performance or risk profiles of acquiring firms?," Journal of Economics and Business, Elsevier, vol. 121(C).
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    6. Betton, Sandra & El Meslmani, Nabil & Switzer, Lorne N., 2022. "Volatility of implied volatility and mergers and acquisitions," Journal of Corporate Finance, Elsevier, vol. 75(C).

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