Abstract
This article studies convex duality in stochastic optimization over finite discrete-time. The first part of the paper gives general conditions that yield explicit expressions for the dual objective in many applications in operations research and mathematical finance. The second part derives optimality conditions by combining general saddle-point conditions from convex duality with the dual representations obtained in the first part of the paper. Several applications to stochastic optimization and mathematical finance are given.
References
- K. Back, S. R. Pliska: The shadow price of information in continuous time decision problems, Stochastics 22(2) (1987) 151–186.https://doi.org/10.1080/17442508708833471Google Scholar
- S. Biagini: An Orlicz spaces duality for utility maximization in incomplete markets, in: Seminar on Stochastic Analysis, Random Fields and Applications V, Progr. Probability 59, Birkhäuser, Basel (2008) 445–455.https://doi.org/10.1007/978-3-7643-8458-6_24Google Scholar
- S. Biagini, M. Frittelli: A unified framework for utility maximization problems: An Orlicz spaces approach, Annals Appl. Probability 18(3) (2008) 929–966.https://doi.org/10.1214/07-AAP469Google Scholar
- L. Campi, M. P. Owen: Multivariate utility maximization with proportional transaction costs, Finance Stochastics 15(3) (2011) 461–499.https://doi.org/10.1007/s00780-010-0125-9Google Scholar
- Y. M. Kabanov: Hedging and liquidation under transaction costs in currency markets, Finance Stochastics 3(2) (1999) 237–248.https://doi.org/10.1007/s007800050061Google Scholar
- Y. M. Kabanov, M. Safarian: Markets with transaction costs. Mathematical Theory, Springer-Verlag, Berlin (2009).https://doi.org/10.1007/978-3-540-68121-2Google Scholar
- D. Kramkov, W. Schachermayer: The condition on the asymptotic elasticity of utility functions and optimal investment in incomplete markets, Annals Appl. Probability 9(3) (1999) 904–950.https://doi.org/10.1214/aoap/1029962818Google Scholar
- D. Kreher: Hedging of Portfolio-Valued Claims under Convex Transaction Costs and Portfolio Constraints, Master’s Thesis, Humboldt-Universität, Berlin (2009).Google Scholar
- T. Pennanen: Arbitrage and deflators in illiquid markets, Finance and Stochastics 15(1) (2011) 57–83.https://doi.org/10.1007/s00780-009-0118-8Google Scholar
- T. Pennanen: Convex duality in stochastic optimization and mathematical finance, Math. Operations Research 36(2) (2011) 340–362.https://doi.org/10.1287/moor.1110.0485Google Scholar
- T. Pennanen: Erratum: Convex duality in stochastic optimization and mathematical finance, Math. Operations Research 41(2) (2016) 732–733.https://doi.org/10.1287/moor.2015.0750Google Scholar
- T. Pennanen, I. Penner: Hedging of claims with physical delivery under convex transaction costs, SIAM J. Financial Mathematics 1 (2010) 158–178.https://doi.org/10.1137/090754182Google Scholar
- T. Pennanen, A.-P. Perkkiö: Stochastic programs without duality gaps, Math. Programming 136(1) (2012) 91–110.https://doi.org/10.1007/s10107-012-0552-9Google Scholar
- T. Pennanen, A.-P. Perkkiö: Shadow price of information in discrete time stochastic optimization, Math. Programming 168(1-2) (2018) 347–367.https://doi.org/10.1007/s10107-017-1163-2Google Scholar
- A.-P. Perkkiö: Stochastic programs without duality gaps for objectives without a lower bound, to appear.Google Scholar
- M. M. Rao, Z. D. Ren: Theory of Orlicz Spaces, Monographs and Textbooks in Pure and Applied Mathematics 146, Marcel Dekker, New York (1991).Google Scholar
- M. Rásonyi, L. Stettner: On utility maximization in discrete-time financial market models, Ann. Appl. Probability 15(2) (2005) 1367–1395.https://doi.org/10.1214/105051605000000089Google Scholar
- R. T. Rockafellar: Conjugate convex functions in optimal control and the calculus of variations, J. Math. Anal. Appl. 32 (1970) 174–222.https://doi.org/10.1016/0022-247X(70)90324-0Google Scholar
- R. T. Rockafellar: Convex Analysis, Princeton Mathematical Series 28, Princeton University Press, Princeton (1970).Google Scholar
- R. T. Rockafellar: Conjugate duality and optimization, Society for Industrial and Applied Mathematics, Philadelphia (1974).https://doi.org/10.1137/1.9781611970524Google Scholar
- R. T. Rockafellar: Integral functionals, normal integrands and measurable selections, in: Nonlinear Operators and the Calculus of Variations, Summer School, Univ. Libre Bruxelles, Brussels 1975, Lecture Notes Math. 543, Springer, Berlin (1976) 157–207.https://doi.org/10.1007/BFb0079944Google Scholar
- R. T. Rockafellar, R. J.-B. Wets: Nonanticipativity and L1 -martingales in stochastic optimization problems, in: Stochastic Systems: Modeling, Identification and Optimization II, Proc. Sympos., Univ Kentucky, Lexington 1975, Math. Program. Studies 6 (1976) 170–187.https://doi.org/10.1007/BFb0120750Google Scholar
- R. T. Rockafellar, R. J.-B. Wets: The optimal recourse problem in discrete time: L1 -multipliers for inequality constraints, SIAM J. Control Optimization 16(1) (1978) 16–36.https://doi.org/10.1137/0316002Google Scholar
- R. T. Rockafellar, R. J.-B. Wets: Deterministic and stochastic optimization problems of Bolza type in discrete time, Stochastics 10(3-4) (1983) 273–312.https://doi.org/10.1080/17442508308833276Google Scholar
- R. T. Rockafellar, R. J.-B. Wets: Variational Analysis, Grundlehren der Mathematischen Wissenschaften 317, Springer-Verlag, Berlin (1998).https://doi.org/10.1007/978-3-642-02431-3Google Scholar
- W. Schachermayer: Optimal investment in incomplete markets when wealth may become negative, Ann. Appl. Probab. 11(3) (2001) 694–734.https://doi.org/10.1214/aoap/1015345346Google Scholar
Suggested citation
Published by Heldermann Verlag, 2018. Rights now held by Banach Press.
