Abstract

This work is motivated by numerical solutions to Hamilton--Jacobi--Bellman quasi-variational inequalities (HJBQVIs) associated with combined stochastic and impulse control problems. In particular, we consider (i) direct control, (ii) penalized, and (iii) semi-Lagrangian discretization schemes applied to the HJBQVI problem. Scheme (i) takes the form of a Bellman problem involving an operator which is not necessarily contractive. We consider the well-posedness of the Bellman problem and give sufficient conditions for convergence of the corresponding policy iteration. To do so, we use weakly chained diagonally dominant matrices, which give a graph-theoretic characterization of weakly diagonally dominant M-matrices. We compare schemes (i)--(iii) under the following examples: (a) optimal control of the exchange rate, (b) optimal consumption with fixed and proportional transaction costs, and (c) pricing guaranteed minimum withdrawal benefits in variable annuities. We find that one should abstain from using scheme (i). (An erratum is attached.)

Keywords

  1. Hamilton--Jacobi--Bellman equation
  2. combined stochastic and impulse control
  3. policy iteration
  4. weakly chained diagonally dominant matrix
  5. optimal exchange rate
  6. optimal consumption
  7. GMWB

MSC codes

  1. 65N06
  2. 93E20

Get full access to this article

View all available purchase options and get full access to this article.

References

1.
P. Azimzadeh and P. A. Forsyth, The existence of optimal bang-bang controls for GMxB contracts, SIAM J. Financial Math., 6 (2015), pp. 117--139.
2.
J. Babbin, P. A. Forsyth, and G. Labahn, A comparison of iterated optimal stopping and local policy iteration for American options under regime switching, J. Sci. Comput., 58 (2014), pp. 409--430.
3.
G. Barles and P. E. Souganidis, Convergence of approximation schemes for fully nonlinear second order equations, Asymptot. Anal., 4 (1991), pp. 271--283.
4.
E. Bayraktar and H. Xing, Pricing Asian options for jump diffusion, Math. Finance, 21 (2011), pp. 117--143.
5.
A. Bensoussan and J. L. Lions, Impulse Control and Quasi-Variational Inequalities, Gauthier-Villars, Paris, 1984.
6.
O. Bokanowski, S. Maroso, and H. Zidani, Some convergence results for Howard's algorithm, SIAM J. Numer. Anal., 47 (2009), pp. 3001--3026.
7.
J. H. Bramble and B. E. Hubbard, On a finite difference analogue of an elliptic boundary problem which is neither diagonally dominant nor of non-negative type, J. Math. Phys., 43 (1964), p. 117.
8.
A. Cadenillas and F. Zapatero, Optimal central bank intervention in the foreign exchange market, J. Econom. Theory, 87 (1999), pp. 218--242.
9.
J. P. Chancelier, M. Messaoud, and A. Sulem, A policy iteration algorithm for fixed point problems with nonexpansive operators, Math. Methods Oper. Res., 65 (2007), pp. 239--259.
10.
J. P. Chancelier, B. Øksendal, and A. Sulem, Combined stochastic control and optimal stopping, and application to numerical approximation of combined stochastic and impulse control, Proc. Steklov Inst. Math., 237 (2002), pp. 149--172.
11.
Z. Chen and P. A. Forsyth, A numerical scheme for the impulse control formulation for pricing variable annuities with a guaranteed minimum withdrawal benefit (GMWB), Numer. Math., 109 (2008), pp. 535--569.
12.
R. Cont and E. Voltchkova, A finite difference scheme for option pricing in jump diffusion and exponential Lévy models, SIAM J. Numer. Anal., 43 (2005), pp. 1596--1626.
13.
M. Dai, Y. K. Kwok, and J. Zong, Guaranteed minimum withdrawal benefit in variable annuities, Math. Finance, 18 (2008), pp. 595--611.
14.
P. A. Forsyth and G. Labahn, Numerical methods for controlled Hamilton-Jacobi-Bellman PDEs in finance, J. Comput. Finance, 11 (2007).
15.
Y. Huang, P. A. Forsyth, and G. Labahn, Inexact arithmetic considerations for direct control and penalty methods: American options under jump diffusion, Appl. Numer. Math., 72 (2013), pp. 33--51.
16.
K. Ishii, Viscosity solutions of nonlinear second order elliptic PDEs associated with impulse control problems, Funkcial. Ekvac., 36 (1993), pp. 123--141.
17.
I. Kharroubi, J. Ma, H. Pham, J. Zhang, et al., Backward SDEs with constrained jumps and quasi-variational inequalities, Ann. Appl. Probab., 38 (2010), pp. 794--840.
18.
H. J. Kushner and P. G. Dupuis, Numerical Methods for Stochastic Control Problems in Continuous Time, Springer-Verlag, New York, 1992.
19.
H. Le and C. Wang, A finite time horizon optimal stopping problem with regime switching, SIAM J. Control Optim., 48 (2010), pp. 5193--5213.
20.
M. A. Milevsky and T. S. Salisbury, Financial valuation of guaranteed minimum withdrawal benefits, Insurance Math. Econom., 38 (2006), pp. 21--38.
21.
G. Mundaca and B. Øksendal, Optimal stochastic intervention control with application to the exchange rate, J. Math. Econom., 29 (1998), pp. 225--243.
22.
A. M. Oberman, Convergent difference schemes for degenerate elliptic and parabolic equations: Hamilton-Jacobi equations and free boundary problems, SIAM J. Numer. Anal., 44 (2006), pp. 879--895.
23.
B. Øksendal and A. Sulem, Applied Stochastic Control of Jump Diffusions, Probab. Theory Stochastic Processes 498, Springer, New York, 2005.
24.
R. J. Plemmons, M-matrix characterizations. I---Nonsingular M-matrices, Linear Algebra Appl., 18 (1977), pp. 175--188.
25.
R. C. Seydel, Existence and uniqueness of viscosity solutions for QVI associated with impulse control of jump-diffusions, Stochastic Process. Appl., 119 (2009), pp. 3719--3748.
26.
P. N. Shivakumar and K. H. Chew, A sufficient condition for nonvanishing of determinants, Proc. Amer. Math. Soc., 43 (1974), pp. 63--66.
27.
J. H. Witte and C. Reisinger, Penalty methods for the solution of discrete HJB equations: Continuous control and obstacle problems, SIAM J. Numer. Anal., 50 (2012), pp. 595--625.

Information & Authors

Information

Published In

cover image SIAM Journal on Numerical Analysis
SIAM Journal on Numerical Analysis
Pages: 1341 - 1364
ISSN (online): 1095-7170

History

Submitted: 12 October 2015
Accepted: 18 March 2016
Published online: 5 May 2016

Keywords

  1. Hamilton--Jacobi--Bellman equation
  2. combined stochastic and impulse control
  3. policy iteration
  4. weakly chained diagonally dominant matrix
  5. optimal exchange rate
  6. optimal consumption
  7. GMWB

MSC codes

  1. 65N06
  2. 93E20

Authors

Affiliations

Funding Information

Natural Sciences and Engineering Research Council of Canadahttp://dx.doi.org/10.13039/501100000038: 36828

Metrics & Citations

Metrics

Citations

If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.

Cited By

View Options

View options

PDF

View PDF

Figures

Tables

Media

Share

Share

Copy the content Link

Share with email

Email a colleague

Share on social media