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The effect of mergers on implied volatility of equity options

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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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    4. 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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