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Digital Contracts and Price Manipulation

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  • Joel M. Vanden

    (Tuck School of Business, Dartmouth College)

Abstract

Corporate insiders holding derivative contracts on their firm's stock have an incentive to engage in stock price manipulation. I examine several derivative contracts susceptible to manipulation and the price impact of the insiders' strategic behavior. Digital contracts, the basic building blocks for valuing complex financial derivatives, are vulnerable to manipulation. The impact of the strategies from holding digital contracts is consistent with an implied volatility skew and volatility clustering. Even seemingly innocuous derivatives, such as ordinary bull spreads, generate these manipulation incentives. This has strong implications for corporate policy, since firms often use option spreads in their stock repurchase programs.

Suggested Citation

  • Joel M. Vanden, 2005. "Digital Contracts and Price Manipulation," The Journal of Business, University of Chicago Press, vol. 78(5), pages 1891-1916, September.
    • Handle: RePEc:ucp:jnlbus:v:78:y:2005:i:5:p:1891-1916
    DOI: 10.1086/431446
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    Cited by:

    1. Horst, Ulrich & Naujokat, Felix, 2010. "Illiquidity and derivative valuation," SFB 649 Discussion Papers 2010-011, Humboldt University Berlin, Collaborative Research Center 649: Economic Risk.
    2. Ulrich Horst & Felix Naujokat, 2008. "Illiquidity and Derivative Valuation," Papers 0901.0091, arXiv.org.

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