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Neofytos Rodosthenous and Mihail Zervos

LSE Research Online Documents on Economics from London School of Economics and Political Science, LSE Library

Abstract: We consider a new family of derivatives whose payoffs become strictly positive when the price of their underlying asset falls relative to its historical maximum. We derive the solution to the discretionary stopping problems arising in the context of pricing their perpetual American versions by means of an explicit construction of their value functions. In particular, we fully characterise the free-boundary functions that provide the optimal stopping times of these genuinely two-dimensional problems as the unique solutions to highly non-linear first order ODEs that have the characteristics of a separatrix. The asymptotic growth of these free-boundary functions can take qualitatively different forms depending on parameter values, which is an interesting new feature.

Keywords: optimal stopping; running maximum process; variational inequality; two dimensional free-boundary problem; separatrix (search for similar items in EconPapers)
JEL-codes: C61 G13 (search for similar items in EconPapers)
Date: 2017-01-01
New Economics Papers: this item is included in nep-cfn and nep-rmg
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Published in Finance and Stochastics, 1, January, 2017, 21(1), pp. 157-186. ISSN: 0949-2984

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Persistent link: https://EconPapers.repec.org/RePEc:ehl:lserod:67859

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