Search Results for author: Benjamin Jourdain

Found 5 papers, 1 papers with code

Implied volatility (also) is path-dependent

1 code implementation26 Dec 2023 Hervé Andrès, Alexandre Boumezoued, Benjamin Jourdain

Moreover, we show that up to four years of the past evolution of the underlying price should be used for the prediction and that this feedback effect gets weaker when the maturity increases.

Signature-based validation of real-world economic scenarios

no code implementations2 Aug 2022 Hervé Andrès, Alexandre Boumezoued, Benjamin Jourdain

Motivated by insurance applications, we propose a new approach for the validation of real-world economic scenarios.

One dimensional martingale rearrangement couplings

no code implementations29 Jan 2021 Benjamin Jourdain, William Margheriti

Under a barycentre dispersion assumption on the original coupling which is in particular satisfied by the Hoeffding-Fr\'echet or comonotone coupling, Wiesel gives a clear algorithmic construction of a martingale rearrangement when the marginals are finitely supported and then gets rid of the finite support assumption by relying on a rather messy limiting procedure to overcome the lack of relative compactness.

Probability 60G42, 60E15, 91G80

Quantization and martingale couplings

no code implementations18 Dec 2020 Benjamin Jourdain, Gilles Pagès

Quantization provides a very natural way to preserve the convex order when approximating two ordered probability measures by two finitely supported ones.

Quantization Probability 60E15, 65C50, 65D32, 60J22, 60G42

Approximation rate in Wasserstein distance of probability measures on the real line by deterministic empirical measures

no code implementations17 Dec 2020 Oumaima Bencheikh, Benjamin Jourdain

In \cite{xuberger}, Xu and Berger show that, apart when $\mu$ is a Dirac mass and the error vanishes, the order is not larger than $1$ and give a sufficient condition for the order to be equal to this threshold $1$ in terms of the density of the absolutely continuous with respect to the Lebesgue measure part of $\mu$.

Probability 49Q22, 60-08

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