251 research outputs found
Essays on modeling, hedging and pricing of insurance and financial products
Cette thĂšse est composĂ©e de trois articles abordant diffĂ©rentes problĂ©matiques en relation avec la modĂ©lisation, la couverture et la tarification des risques dâassurance et financiers. âA general class of distortion operators for pricing contingent claims with applications to CAT bondsâ est un projet prĂ©sentant une mĂ©thode gĂ©nĂ©rale pour dĂ©river des opĂ©rateurs de distorsion compatibles avec la valorisation sans arbitrage. Ce travail offre Ă©galement une nouvelle classe simple dâopĂ©rateurs de distorsion afin dâexpliquer les primes observĂ©es dans le marchĂ© des obligations catastrophes. âLocal hedging of variable annuities in the presence of basis riskâ est un travail dans lequel une mĂ©thode de couverture des rentes variables en prĂ©sence de risque de base est dĂ©veloppĂ©e. La mĂ©thode de couverture proposĂ©e bĂ©nĂ©ficie dâune exposition plus Ă©levĂ©e au risque de marchĂ© et dâune diversification temporelle du risque pour obtenir un rendement excĂ©dentaire et faciliter lâaccumulation de capital. âOption pricing under regime-switching models : Novel approaches removing path-dependenceâ est un projet dans lequel diverses mesures neutres au risque sont construites pour les modĂšles Ă changement de rĂ©gime de maniĂšre Ă gĂ©nĂ©rer des processus de prix dâoption qui ne prĂ©sentent pas de dĂ©pendance au chemin, en plus de satisfaire dâautres propriĂ©tĂ©s jugĂ©es intuitives et souhaitables.This thesis is composed of three papers addressing different issues in relation to the modeling, hedging and pricing of insurance and financial risks. âA general class of distortion operators for pricing contingent claims with applications to CAT bondsâ is a project presenting a general method for deriving probability distortion operators consistent with arbitrage-free pricing. This work also offers a simple novel class of distortions operators for explaining catastrophe (CAT) bond spreads. âLocal hedging of variable annuities in the presence of basis riskâ is a work in which a method to hedge variable annuities in the presence of basis risk is developed. The proposed hedging scheme benefits from a higher exposure to equity risk and from time diversification of risk to earn excess return and facilitate the accumulation of capital. âOption pricing under regime-switching models: Novel approaches removing path-dependenceâ is a project in which various risk-neutral measures for hidden regime-switching models are constructed in such a way that they generate option price processes which do not exhibit path-dependence in addition to satisfy other properties deemed intuitive and desirable
2D growth processes: SLE and Loewner chains
This review provides an introduction to two dimensional growth processes.
Although it covers a variety processes such as diffusion limited aggregation,
it is mostly devoted to a detailed presentation of stochastic Schramm-Loewner
evolutions (SLE) which are Markov processes describing interfaces in 2D
critical systems. It starts with an informal discussion, using numerical
simulations, of various examples of 2D growth processes and their connections
with statistical mechanics. SLE is then introduced and Schramm's argument
mapping conformally invariant interfaces to SLE is explained. A substantial
part of the review is devoted to reveal the deep connections between
statistical mechanics and processes, and more specifically to the present
context, between 2D critical systems and SLE. Some of the SLE remarkable
properties are explained, as well as the tools for computing with SLE. This
review has been written with the aim of filling the gap between the
mathematical and the physical literatures on the subject.Comment: A review on Stochastic Loewner evolutions for Physics Reports, 172
pages, low quality figures, better quality figures upon request to the
authors, comments welcom
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