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    From local volatility to local lévy models

    Geman, Helyette and Carr, P. and Madan, D.P. and Yor, M. (2004) From local volatility to local lévy models. Quantitative Finance 4 (5), pp. 581-588. ISSN 1469-7688.

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    Abstract

    We define the class of local Lévy processes. These are Lévy 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 Lévy 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.

    Metadata

    Item Type: Article
    School: School of Business, Economics & Informatics > Economics, Mathematics and Statistics
    Depositing User: Sarah Hall
    Date Deposited: 09 Jun 2020 06:58
    Last Modified: 09 Jun 2020 06:58
    URI: https://eprints.bbk.ac.uk/id/eprint/32190

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