Systematic equity-based credit risk: A CEV model with jump to default

Luciano Campi, Simon Polbennikov and Alessandro Sbuelz

Journal of Economic Dynamics and Control, 2009, vol. 33, issue 1, 93-108

Abstract: We use equity as the traded primitive for a detailed analysis of systematic default risk. Default is parsimoniously represented by equity value hitting the zero barrier so that, unlike in reduced-form models, the explicit linkage to the firm's capital structure is preserved, but, unlike in structural models, restrictive assumptions on the structure are avoided. Default risk is either jump-like or diffusive. The equity price can jump to default. In line with recent empirical evidence on the jump-to-default risk price, we highlight how reasonable choices of the pricing kernel can imply remarkable differences in the equity-price-dependent status between the objective default intensity and the risk-neutral intensity. As equity returns experience negative diffusive shocks, their CEV-type local variance increases and boosts the objective and risk-neutral probabilities of diffusive default. A parsimonious version of our general model simultaneously enables analytical credit-risk management and analytical pricing of credit-sensitive instruments. Easy cross-asset hedging ensues.

Keywords: Market; price; of; credit; risk; Constant-elasticity-of-variance; (CEV); diffusive; risk; Jump-to-default; risk; Equity; Corporate; bonds; Credit; default; swaps (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (17)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:dyncon:v:33:y:2009:i:1:p:93-108

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