A closed-form extension to the Black-Cox model - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2009

A closed-form extension to the Black-Cox model

Résumé

In the Black-Cox model, a firm defaults when its value hits an exponential barrier. Here, we propose an hybrid model that generalizes this framework. The default intensity can take two different values and switches when the firm value crosses a barrier. Of course, the intensity level is higher below the barrier. We get an analytic formula for the Laplace transform of the default time and present numerical methods to numerically recover its distribution. Last, we explain how this model can be calibrated to Credit Default Swap prices and show its tractability on different kind of data.
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Dates et versions

hal-00414280 , version 1 (08-09-2009)
hal-00414280 , version 2 (29-03-2010)

Identifiants

  • HAL Id : hal-00414280 , version 1

Citer

Alfonsi Aurélien, Jérôme Lelong. A closed-form extension to the Black-Cox model. 2009. ⟨hal-00414280v1⟩

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