Experience
Publications
Read their latest work
Article
Climate stress tests on corporate bonds
20 December 2024 - by Sophian Mehalla, Louis Schirra
We simulate real-world and risk-neutral scenarios that integrate transition climate risk in credit spreads and equities.
Article
Consistent equity risk-neutral valuation under climate stress tests
02 February 2024 - by Sophian Mehalla, Grzegorz Darkiewicz, Michał Krzemiński, Céline Francony
With a proper granularity of modeling, shocks prescribed by European regulators related to climate transition risk can be applied to estimate ALM impacts.
Article
気候ストレステスト下での整合的株式リスクニュートラル評価
02 February 2024 - by Sophian Mehalla, Grzegorz Darkiewicz, Michał Krzemiński, Céline Francony
適切な粒度でモデリングすることで、欧州の規制当局が規定する気候変遷リスクに関するショックを適用してALMの影響度を推計することが可能です。
Article
余弦密度近似:スワプション・プライシングへの応用
09 August 2023 - by Sophian Mehalla, Lucien Morice
本稿では、計算時間の大幅な短縮につながる、スワップションに適用される余弦級数密度近似に基づく代替プライシング手法に注目します。
Article
Cosine densities approximations: Applications to swaptions pricing
09 August 2023 - by Sophian Mehalla, Lucien Morice
We look at an alternative pricing method based on density cosine-series approximation applied to swaptions, which offers a significant gain in computation time.
Article
The impact of carbon risk factor on equity dynamics
14 October 2022 - by Alexandre Boumezoued, Sophian Mehalla, Valentin Germain
With better understanding of climate transition risk exposure and stress tests proposed by regulators, internal models can help provide insights.
Article
カーボンリスクファクターの株価ダイナミクスへの影響
14 October 2022 - by Alexandre Boumezoued, Sophian Mehalla, Valentin Germain
気候関連の移行リスクエクスポージャーおよび規制当局が提案するストレステストをよりよく理解することで、内部モデルはインサイトの提供に役立ちます。
Article
DDSVLMM金利モデルのニューラルネットワーク較正、そしてウエイト計算への応用
29 November 2021 - by Pierre-Edouard Arrouy, Paul Bonnefoy, Alexandre Boumezoued, Yousra Cherkaoui Tangi, Grzegorz Darkiewicz, Sophian Mehalla
ニューラルネットワークを用いて計算時間を大幅に削減した、複合的リスクニュートラルモデルの較正テクニックについてお伝えします。
Article
Neural network calibration of the DDSVLMM interest rates model, and application to weights calculation
29 November 2021 - by Pierre-Edouard Arrouy, Paul Bonnefoy, Alexandre Boumezoued, Yousra Cherkaoui Tangi, Grzegorz Darkiewicz, Sophian Mehalla
We present a calibration technique for one complex risk neutral model, relying on neural networks and significantly reducing computational time.
Article
Challenges in the calibration of real world models within Economic Scenarios Generators
16 September 2021 - by Hervé Andrès, Pierre-Edouard Arrouy, Paul Bonnefoy, Alexandre Boumezoued, Sophian Mehalla, Julien Vedani
Learn why the best economic scenario generator solution provides the choice of different methods and what challenges real world models pose.