Ornstein-Uhlenbeck type processes with heavy distribution tails

Details Ornstein-Uhlenbeck type processes with heavy distribution tails Ornstein-Uhlenbeck type processes with heavy distribution tails

2011-02-28

arxiv.org/abs/1102.5606v1

Mathematics

Probability

26 pages, 9 figures

Scientific paper

We consider a transformed Ornstein-Uhlenbeck process model that can be a good candidate for modelling real-life processes characterized by a combination of time-reverting behaviour with heavy distribution tails. We begin with presenting the results of an exploratory statistical analysis of the log prices of a major Australian public company, demonstrating several key features typical of such time series. Motivated by these findings, we suggest a simple transformed Ornstein-Uhlenbeck process model and analyze its properties showing that the model is capable of replicating our empirical findings. We also discuss three different estimators for the drift coefficient in the underlying (unobservable) Ornstein-Uhlenbeck process which is the key descriptor of dependence in the process.

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