## The Annals of Applied Probability

### Optimal stopping problems for the maximum process with upper and lower caps

Curdin Ott

#### Abstract

This paper concerns optimal stopping problems driven by the running maximum of a spectrally negative Lévy process $X$. More precisely, we are interested in modifications of the Shepp–Shiryaev optimal stopping problem [Avram, Kyprianou and Pistorius Ann. Appl. Probab. 14 (2004) 215–238; Shepp and Shiryaev Ann. Appl. Probab. 3 (1993) 631–640; Shepp and Shiryaev Theory Probab. Appl. 39 (1993) 103–119]. First, we consider a capped version of the Shepp–Shiryaev optimal stopping problem and provide the solution explicitly in terms of scale functions. In particular, the optimal stopping boundary is characterised by an ordinary differential equation involving scale functions and changes according to the path variation of $X$. Secondly, in the spirit of [Shepp, Shiryaev and Sulem Advances in Finance and Stochastics (2002) 271–284 Springer], we consider a modification of the capped version of the Shepp–Shiryaev optimal stopping problem in the sense that the decision to stop has to be made before the process $X$ falls below a given level.

#### Article information

Source
Ann. Appl. Probab., Volume 23, Number 6 (2013), 2327-2356.

Dates
First available in Project Euclid: 22 October 2013

https://projecteuclid.org/euclid.aoap/1382447690

Digital Object Identifier
doi:10.1214/12-AAP903

Mathematical Reviews number (MathSciNet)
MR3127937

Zentralblatt MATH identifier
1290.60048

#### Citation

Ott, Curdin. Optimal stopping problems for the maximum process with upper and lower caps. Ann. Appl. Probab. 23 (2013), no. 6, 2327--2356. doi:10.1214/12-AAP903. https://projecteuclid.org/euclid.aoap/1382447690

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