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From local volatility to local Leacutevy models

Authors: Peter Carr a;  Helyette Geman b;  Dilip B. Madan c; Marc Yor d
Affiliations:   a Courant Institute, New York University, USA
b Universiteacute Paris-Dauphine and ESSEC, France
c Robert H Smith School of Business, University of Maryland, USA
d Laboratoire de Probabilitieacutes et Modeacuteles aleacuteatoires Universiteacute Paris VI and Universiteacute Paris VII, France
DOI: 10.1080/14697680400000039
Publication Frequency: 8 issues per year
Published in: journal Quantitative Finance, Volume 4, Issue 5 October 2004 , pages 581 - 588
Number of References: 25
Formats available: PDF (English)
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Abstract

We define the class of local Leacutevy processes. These are Leacutevy processes time changed by an inhomogeneous local speed function. The local speed function is a deterministic function of time and the level of the process itself. We show how to reverse engineer the local speed function from traded option prices of all strikes and maturities. The local Leacutevy processes generalize the class of local volatility models. Closed forms for local speed functions for a variety of cases are also presented. Numerical methods for recovery are also described.
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