Abstract We design a discrete time arbitrage-free model under incomplete information for application to credit risk models in the spirit of Duffie and Lando (2001). We assume a fundamental value process evolving according to a complete market model and a sequence of imperfect signals conveying...

Counterparty risk is usually defined as the risk which stems from the fact that the counterparty of a derivative contract is not solvent before or at expiration. As most of the derivative trading activity has been moving from standardized products quoted on futures‐style markets, towards...

The paper uses fuzzy measure theory to represent liquidity risk, i.e. the case in which the probability measure used to price contingent claims is not known precisely. This theory enables one to account for different values of long and short positions. Liquidity risk is introduced by...

A recent stream of literature has suggested that many market imperfections or 'puzzles' can be easily explained once information ambiguity, or knightian uncertainty is taken into account. Here we propose a parametric representation of this concept by means of a special class of fuzzy measures,...

We propose a hierarchical Marshall–Olkin model of countrywide systemic risk. At the lower level, we model the systemic risk of a crisis within the banking system (that we call “within” systemic risk) and at the higher level we model the probability of a joint default of the banking system...

type="main" xml:lang="en" <p>In this paper we present a value-at-risk measure which accounts for market liquidity. We show that taking into account market liquidity implies a decoupling of valuation of long and short positions. We present a pricing model, named fuzzy measure model, that yields...</p>

type="main" xml:lang="en" <p>This paper uses copula functions to evaluate tail probabilities and market risk trade-offs at a given confidence level, dropping the joint normality assumption on returns. Copulas enable one to represent distribution functions separating the marginal distributions from...</p>

Viene proposta una metodologia per costruire scenari coerenti per analisi distress testing nel controllo dei rischi finanziari. Il metodo, basato sull'approccio bayesiano di Black e Litterman per l'ottimizzazione del portafoglio, consente di anire informazione storica e implicita, pubblica e...

We propose a new index for measuring the systemic risk of default of the banking sector, which is based on a homogeneous version of multivariate intensity based models (Cuadras–Augé distribution). We compute the index for 10 European countries, exploiting the information incorporated in the...