Showing 1 - 10 of 142
We introduce a tractable class of non-affine price processes with multifrequency stochastic volatility and jumps. The specifi cations require few fixed parameters and deliver fast option pricing. One key ingredient is a tight link between jumps and volatility regimes, as asset pricing theory...
Persistent link: https://www.econbiz.de/10010505458
French Abstract: Les Credit Default Swaps (CDS) sont de plus en plus populaires pour la protection contre les défauts et la spéculation. Cette étude se concentre sur la modélisation précise du défaut en temps continu, puis sur l'evaluation des CDS. De nombreux cas entraînent l'annulation...
Persistent link: https://www.econbiz.de/10012831561
The Wishart Autoregressive (WAR) process is a multivariate process of stochastic positive definite matrices. The WAR is proposed in this paper as a dynamic model for stochastic volatility matrices. It yields simple nonlinear forecasts at any horizon and has factor representation, which separates...
Persistent link: https://www.econbiz.de/10005357414
Le rapport fait le point sur les interactions entre la volatilité des prix du pétrole et les stratégies des acteurs financiers. Il présente également les réflexions et actions en cours au niveau international pour améliorer le fonctionnement des marchés pétroliers. Et au final, il...
Persistent link: https://www.econbiz.de/10009364872
It is well-known that Gaussian hedging strategies are robust in the sense that they always lead to a cost process of bounded variation and that a superhedge is possible if upper bounds on the volatility of the relevant processes are available, cf. El Karoui, Jeanblanc-Picque and Shreve (1998)...
Persistent link: https://www.econbiz.de/10004968401
In this paper, we study the following models : Heath-Jarrow-Morton (1992) and Libor-Market- Model, also known as Brace-Gatarek-Musiela model (1997). We survey the extensions of these models and their representation in the Black and Scholes world. Our approach is pedagogical and is based on an...
Persistent link: https://www.econbiz.de/10005710034
En recourant de plus en plus aux modèles à forme réduite, la théorie de l'évaluation du risque de crédit se distance de plus en plus de l'ingénierie financière traditionnelle qui donne la part belle aux modèles structurels. Bien qu'ils postulent l'absence d'arbitrage, les modèles à...
Persistent link: https://www.econbiz.de/10005773136
Plusieurs gestionnaires de portefeuille pensent encore à tort qu’une couverture delta suffit pour protéger leur portefeuille contre les fluctuations des marchés financiers. Mais une augmentation marquée de la volatilité des cours boursiers les décevra dans leurs attentes. Après avoir...
Persistent link: https://www.econbiz.de/10005773140
Monte Carlo simulation has an advantage upon the binomial tree as it can take into account the multidimensions of a problem. However it convergence speed is slower. In this article, we show how this method may be improved by various means: antithetic variables, control variates and low...
Persistent link: https://www.econbiz.de/10005773152
In this paper, we simulate portfolios which aim to insure the invested capital. The object of our simulations is the duplication of the cashflows of strategies based on options. We initially show how to duplicate the cash-flows of a call by using a leveraged portfolio of stocks. After, we...
Persistent link: https://www.econbiz.de/10005773156