Titre : | Overfitting of Hurst estimators for multifractional Brownian motion: A fitting test advocating simple models (2018) |
Auteurs : | Pierre Raphaël Bertrand ; Jean-Louis Combes ; Marie-Eliette Dury ; Doha Hadouni ; Sergio Bianchi |
Type de document : | Article : Revues - Articles |
Dans : | Risk and Decision Analysis (vol.7 n°1-2, 2018-05-30) |
Article en page(s) : | pp 31 - 49 |
Langues: | Anglais |
Catégories : |
[Eurovoc] ÉCONOMIE > analyse économique > statistique [Eurovoc] FINANCES > libre circulation des capitaux > marché financier |
Tags : | Fractional Brownian motion (fBm) ; multifractional Brownian motion (mBm) ; time-varying Hurst index ; wavelet series expansion ; finance time series |
Résumé : | The aim of this paper is to provide simple models with a time-varying Hurst index. Such models should be simple as much as possible and well fit the estimated Hurst index. After a recall on the fractional and multifractional Brownian motion and on the statistical estimation of the Hurst index, we propose a fitting test for a model with a time-varying Hurst index. Then, we give an approach to select a simple model. Our approach is illustrated by numerous numerical simulations and then applied to market finance data. |
Doi : | DOI : 10.3233/RDA-180136 |
Axe de recherche : | Financement du développement |
En ligne : | https://hal.archives-ouvertes.fr/hal-01816206 |