In this paper, we present a general discrete-time affine framework aimed at jointly modeling yield curves associated with different debtors. The underlying fixed-income securities may differ in terms of credit quality and/or in terms of liquidity. The risk factors follow conditionally Gaussian...

In this paper, we propose a model of the joint dynamics of euro-area sovereign yield curves. The arbitrage-free valuation framework involves five factors and two regimes, one of the latter being interpreted as a crisis regime. These common factors and regimes explain most of the fluctuations in...

This paper studies the relationship between consumption and wealth based on the concept of cointegration. The analysis focuses on French data over the 1987 - 2006 period. This relationship is expressed in two ways: in terms of Marginal Propensity to Consume out of wealth (MPC) and in terms of...

This paper shows, from the consumer budget constraint, that the consumption spending and the different components of total wealth, i.e. financial, housing and human wealths, are cointegrated and that deviations from the common trend cahy is a proxy for the consumption-wealth ratio that should...

We evaluate how departure from normality may affect the allocation of assets. A Taylor series expansion of the expected utility allows to focus on certain moments and to compute numerically the optimal portfolio allocation. A decisive advantage of this approach is that it remains operational...

Recent portfolio choice asset pricing and option valuation models highlight the importance of skewness and kurtosis. Since skewness and kurtosis are related to extreme variations they are also important for Value-at-Risk measurements. Our framework builds on a GARCH model with a condi-tional...

Recent portfolio choice asset pricing and option valuation models highlight the importance of skewness and kurtosis. Since skewness and kurtosis are related to extreme variations they are also important for Value-at-Risk measurements. Our framework builds on a GARCH model with a condi-tional...

Speculators can discover whether a signal is true or false by processing it but this takes time. Hence they face a trade-off between trading fast on a signal (i.e., before processing it), at the risk of trading on a false news, or trading after processing the signal, at the risk that prices...

This paper analyses the role of credit rating agencies in sovereign debt crises. Using a panel of 53 emerging and developing countries with annual data going back to 1977, the paper shows that credit ratings are not very good predictors of debt distress events once tested against a simple...

Pour expliquer l'existence de règles de «stop-loss» dans les institutions financières, nous développons un modèle principal-agent, où une firme d'investissement (le principal) doit faire appel à l'expertise d'un opérateur (l'agent) pour investir dans un actif risqué et sophistiqué...