In this paper, we characterize explicitly the first derivative of the Value at Risk and the Expected Shortfall with respect to portfolio allocation when netting between positions exists. As a particular case, we examine a simple Gaussian example in order to illustrate the impact of netting...

Economic cycles are the key credit portfolio risk driver and they are autocorrelated over time. We then show that it is economically meaningful to define risk for credit portfolios in a multi period setup. Since one period expected shortfall fails to measure risk adequately in a multi period...

Natural catastrophes attract regularly the attention of media and have become a source of public concern. From a financial viewpoint, natural catastrophes represent idiosyncratic risks,diversifiable at the world level. But for reasons analyzed in this pap er reinsurance markets are unable to...

We analyze the role played by the boundary value for the sensitivity of the creditworthiness predictions in methodologies based on Merton [1974]. We run Monte-Carlo simulations with two various samples of firms - American, European - in order to build confidence intervals for the estimator of...

This paper analyzes the relation between agency conflicts and risk management in a contingent claims model of the firm. In contrast to previous contributions, our analysis incorporates not only stockholder-debtholder conflicts but also managerstockholder conflicts. In particular we consider a...

(VF)Plusieurs théoriciens et praticiens montrent que l’évaluation semble jouer un rôle relativement secondaire dans le processus d’investissement dans la mesure où elle intervient à titre de contrôle ex ante lors d'une phase de ratification. De ce fait, si on admet que l'efficience de...

L'objectif de cet article est de proposer une voie alternative à celle que préconise Zingales pour donner de nouvelles fondations à la finance d'entreprise. En empruntant le même cheminement que Zingales, cet article retient premièrement une définition plus large de la finance, accordant...

Dans les grandes firmes industrielles, des procédures sont mises en place pour contrôler l'investissement. Celles qui s'appliquent aux divisions et aux filiales à 100 % sont étudiées. Nous analysons les liens entre d'une part, l'autonomie en matière d'investissement des responsables...

Extreme Value Theory (EVT) has develop ed very rapidly over the past two decades both methodologically and with respect to applications. Whereas (non–life) actuaries have, at least implicitly, used EVT techniques for a long time, mainly through the emergence of quantitative Risk Management, EVT...

We propose a general robust semiparametric bootstrap method to estimate conditional predictive distributions of GARCH-type models. Our approach is based on a robust estimator for the parameters in GARCH-type models and a robustified resampling method for standardized GARCH residuals, which...