Djibril GUEYE - Academia.edu (original) (raw)
Uploads
Papers by Djibril GUEYE
This thesis deals with various issues related to the quantitative management of financial risks. ... more This thesis deals with various issues related to the quantitative management of financial risks. In the first part, we are interested in the models of default time in credit risk within the framework of the theory of enlargement of filtration. We propose models where the default time can coincide with some economic shock times. Our initial focus is the model of Jiao and Li (2018) in sovereign risk, where the default time coincides with predictable shock times. We extend this model in cases where shocks are not predictable by studying the characteristics of the default time. Second, we present the generalized Cox model which is an extension of the one of Lando (see Lando, 1998). We offer a wide range of examples for boiling our construction. The second part deals with the construction of volatility surfaces of financial assets under the condition of no-arbitrage opportunity using kriging methodologies (also called Gaussian process regression). These surfaces allow to estimate from th...
This thesis deals with various issues related to the quantitative management of financial risks. ... more This thesis deals with various issues related to the quantitative management of financial risks. In the first part, we are interested in the models of default time in credit risk within the framework of the theory of enlargement of filtration. We propose models where the default time can coincide with some economic shock times. Our initial focus is the model of Jiao and Li (2018) in sovereign risk, where the default time coincides with predictable shock times. We extend this model in cases where shocks are not predictable by studying the characteristics of the default time. Second, we present the generalized Cox model which is an extension of the one of Lando (see Lando, 1998). We offer a wide range of examples for boiling our construction. The second part deals with the construction of volatility surfaces of financial assets under the condition of no-arbitrage opportunity using kriging methodologies (also called Gaussian process regression). These surfaces allow to estimate from th...