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An optimal stopping problem for spectrally negative Markov additive processes

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  • Çağlar, M.
  • Kyprianou, A.
  • Vardar-Acar, C.

Abstract

Previous authors have considered optimal stopping problems driven by the running maximum of a spectrally negative Lévy process as well as of a one-dimensional diffusion; see e.g. Kyprianou and Ott (2014); Ott (2014); Ott (2013); Alvarez and Matomäki (2014); Guo and Shepp (2001); Pedersen (2000); Gapeev (2007). Many of the aforementioned results are either implicitly or explicitly dependent on Peskir’s maximality principle, cf. (Peskir, 1998). In this article, we are interested in understanding how some of the main ideas from these previous works can be brought into the setting of problems driven by the maximum of a class of Markov additive processes (more precisely Markov modulated Lévy processes). Similarly to Ott (2013); Kyprianou and Ott (2014); Ott (2014), the optimal stopping boundary is characterised by a system of ordinary first-order differential equations, one for each state of the modulating component of the Markov additive process. Moreover, whereas scale functions played an important role in the previously mentioned work, we work instead with scale matrices for Markov additive processes here; as introduced by Kyprianou and Palmowski (2008); Ivanovs and Palmowski (2012). We exemplify our calculations in the setting of the Shepp–Shiryaev optimal stopping problem (Shepp and Shiryaev, 1993; Shepp and Shiryaev, 1995), as well as a family of capped maximum optimal stopping problems.

Suggested Citation

  • Çağlar, M. & Kyprianou, A. & Vardar-Acar, C., 2022. "An optimal stopping problem for spectrally negative Markov additive processes," Stochastic Processes and their Applications, Elsevier, vol. 150(C), pages 1109-1138.
    • Handle: RePEc:eee:spapps:v:150:y:2022:i:c:p:1109-1138
    DOI: 10.1016/j.spa.2021.06.010
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    References listed on IDEAS

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