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Vulnerable Derivatives and Good Deal Bounds: A Structural Model

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  • Agatha Murgoci

Abstract

We price vulnerable derivatives -- i.e. derivatives where the counterparty may default. These are basically the derivatives traded on the over-the-counter (OTC) markets. Default is modelled in a structural framework. The technique employed for pricing is good deal bounds (GDBs). The method imposes a new restriction in the arbitrage free model by setting upper bounds on the Sharpe ratios (SRs) of the assets. The potential prices that are eliminated represent unreasonably good deals. The constraint on the SR translates into a constraint on the stochastic discount factor. Thus, tight pricing bounds can be obtained. We provide a link between the objective probability measure and the range of potential risk-neutral measures, which has an intuitive economic meaning. We also provide tight pricing bounds for European calls and show how to extend the call formula to pricing other financial products in a consistent way. Finally, we numerically analyse the behaviour of the good deal pricing bounds.

Suggested Citation

  • Agatha Murgoci, 2013. "Vulnerable Derivatives and Good Deal Bounds: A Structural Model," Applied Mathematical Finance, Taylor & Francis Journals, vol. 20(3), pages 246-263, July.
    • Handle: RePEc:taf:apmtfi:v:20:y:2013:i:3:p:246-263
    DOI: 10.1080/1350486X.2012.681964
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