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Finance and Stochastics

Erschienen in:

01.01.2015

Robust price bounds for the forward starting straddle

verfasst von: David Hobson, Martin Klimmek

Erschienen in: Finance and Stochastics | Ausgabe 1/2015

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Abstract

We consider the problem of giving a robust, model-independent, lower bound on the price of a forward starting straddle with payoff \(|F_{T_{1}} - F_{T_{0}}|\), where 0<T ₀<T ₁. Rather than assuming a model for the underlying forward price (F _t)_t≥0, we assume that call prices for maturities T ₀<T ₁ are given and hence that the marginal laws of the underlying are known. The primal problem is to find the model that is consistent with the observed call prices and for which the price of the forward starting straddle is minimised. The dual problem is to find the cheapest semi-static subhedge.

Under an assumption on the supports of the marginal laws, but no assumption that the laws are atom-free or in any other way regular, we derive explicit expressions for the coupling which minimises the price of the option, and the form of the semi-static subhedge.

Vorheriger Artikel Optimal investment and price dependence in a semi-static market

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Titel: Robust price bounds for the forward starting straddle
verfasst von: David Hobson
Martin Klimmek
Publikationsdatum: 01.01.2015
Verlag: Springer Berlin Heidelberg
Erschienen in: Finance and Stochastics / Ausgabe 1/2015
Print ISSN: 0949-2984
Elektronische ISSN: 1432-1122
DOI: https://doi.org/10.1007/s00780-014-0249-4

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