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Martingale property of exponential semimartingales: a note on explicit conditions and applications to financial models

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  • David Criens
  • Kathrin Glau
  • Zorana Grbac

Abstract

We give a collection of explicit sufficient conditions for the true martingale property of a wide class of exponentials of semimartingales. We express the conditions in terms of semimartingale characteristics. This turns out to be very convenient in financial modeling in general. Especially it allows us to carefully discuss the question of well-definedness of semimartingale Libor models, whose construction crucially relies on a sequence of measure changes.

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  • David Criens & Kathrin Glau & Zorana Grbac, 2015. "Martingale property of exponential semimartingales: a note on explicit conditions and applications to financial models," Papers 1506.08127, arXiv.org, revised Aug 2016.
    • Handle: RePEc:arx:papers:1506.08127
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    References listed on IDEAS

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    Cited by:

    1. Christa Cuchiero & Claudio Fontana & Alessandro Gnoatto, 2016. "A general HJM framework for multiple yield curve modelling," Finance and Stochastics, Springer, vol. 20(2), pages 267-320, April.
    2. Kathrin Glau & Zorana Grbac & Antonis Papapantoleon, 2016. "A unified view of LIBOR models," Papers 1601.01352, arXiv.org, revised Jul 2016.

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