Non stationarity of high order return distribution moments and their Irrational fractional Brownian Motion modelling

Conference paper


Dhesi, G (2018). Non stationarity of high order return distribution moments and their Irrational fractional Brownian Motion modelling. EURO 2018. Valencia 08 - 11 Jul 2018
AuthorsDhesi, G
TypeConference paper
Abstract

This paper reports results on the forecast of the numerical value of the fat tail(s) exponent, kurtosis, and skewness of asset price distributions obtained from stock market indices, moreover simulated using the Irrational Fractional Brownian Motion (IFBM) model. An auto regressive analysis advances the understanding of the modelling and forecasting the returns distributions moments, whence provides some logical argument for the detailed shape of returns distributions and accurate measurement of Value at Risk.
The methodology uses a moving time interval width procedure, going beyond a standard consideration about the evolution of IFBM parameters for a time interval divided into 2 years wide windows. In so doing, we search whether there is non stationarity effect due to the width of windows, investigating what is going on from small to large windows. Thus, we are looking for some “convergence”, - somewhat washing out outliers. We have also examined whether statistical characteristics measured and simulated values depend on the time origin. The various forecasting values are discussed.

Year2018
Accepted author manuscript
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Open
Publication dates
Print11 Jul 2018
Publication process dates
Deposited13 Dec 2018
Accepted19 Apr 2018
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https://openresearch.lsbu.ac.uk/item/86q23

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Valencia abst IFBM Non stationarity.docx
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