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Consumption-Investment Problem with Subsistence Consumption, Bankruptcy, and Random Market Coefficients

Author

Listed:
  • A. Cadenillas

    (University of Alberta)

  • S. P. Sethi

    (University of Toronto)

Abstract

We consider a general continuous-time finite-horizon single-agent consumption and portfolio decision problem with subsistence consumption and value of bankruptcy. Our analysis allows for random market coefficients and general continuously differentiable concave utility functions. We study the time of bankruptcy as a problem of optimal stopping, and succeed in obtaining explicit formulas for the optimal consumption and wealth processes in terms of the optimal bankruptcy time. This paper extends the results of Karatzas, Lehoczky, and Shreve (Ref. 1) on the maximization of expected utility from consumption in a financial market with random coefficients by incorporating subsistence consumption and bankruptcy. It also addresses the random coefficients and finite-horizon version of the problem treated by Sethi, Taksar, and Presman (Ref. 2). The mathematical tools used in our analysis are optimal stopping, stochastic control, martingale theory, and Girsanov change of measure.

Suggested Citation

  • A. Cadenillas & S. P. Sethi, 1997. "Consumption-Investment Problem with Subsistence Consumption, Bankruptcy, and Random Market Coefficients," Journal of Optimization Theory and Applications, Springer, vol. 93(2), pages 243-272, May.
    • Handle: RePEc:spr:joptap:v:93:y:1997:i:2:d:10.1023_a:1022640321499
    DOI: 10.1023/A:1022640321499
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    References listed on IDEAS

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    1. J. Lehoczky & S. Sethi & S. Shreve, 1983. "Optimal Consumption and Investment Policies Allowing Consumption Constraints and Bankruptcy," Mathematics of Operations Research, INFORMS, vol. 8(4), pages 613-636, November.
    2. He, Hua & Pearson, Neil D., 1991. "Consumption and portfolio policies with incomplete markets and short-sale constraints: The infinite dimensional case," Journal of Economic Theory, Elsevier, vol. 54(2), pages 259-304, August.
    3. Sethi, Suresh P. & Taksar, Michael, 1988. "A note on Merton's "Optimum Consumption and Portfolio Rules in a continuous-Time Model"," Journal of Economic Theory, Elsevier, vol. 46(2), pages 395-401, December.
    4. Lippman, Steven A & McCall, John J & Winston, Wayne L, 1980. "Constant Absolute Risk Aversion, Bankruptcy, and Wealth-Dependent Decisions," The Journal of Business, University of Chicago Press, vol. 53(3), pages 285-296, July.
    5. Bardhan, Indrajit, 1994. "Consumption and investment under constraints," Journal of Economic Dynamics and Control, Elsevier, vol. 18(5), pages 909-929, September.
    6. Hua He & Neil D. Pearson, 1991. "Consumption and Portfolio Policies With Incomplete Markets and Short‐Sale Constraints: the Finite‐Dimensional Case1," Mathematical Finance, Wiley Blackwell, vol. 1(3), pages 1-10, July.
    7. Merton, Robert C, 1969. "Lifetime Portfolio Selection under Uncertainty: The Continuous-Time Case," The Review of Economics and Statistics, MIT Press, vol. 51(3), pages 247-257, August.
    8. Sethi, Suresh P. & Taksar, Michael I. & Presman, Ernst L., 1992. "Explicit solution of a general consumption/portfolio problem with subsistence consumption and bankruptcy," Journal of Economic Dynamics and Control, Elsevier, vol. 16(3-4), pages 747-768.
    9. Cox, John C. & Huang, Chi-fu, 1989. "Optimal consumption and portfolio policies when asset prices follow a diffusion process," Journal of Economic Theory, Elsevier, vol. 49(1), pages 33-83, October.
    10. Ioannis Karatzas & John P. Lehoczky & Suresh P. Sethi & Steven E. Shreve, 1986. "Explicit Solution of a General Consumption/Investment Problem," Mathematics of Operations Research, INFORMS, vol. 11(2), pages 261-294, May.
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    Cited by:

    1. Marina Di Giacinto & Salvatore Federico & Fausto Gozzi, 2011. "Pension funds with a minimum guarantee: a stochastic control approach," Finance and Stochastics, Springer, vol. 15(2), pages 297-342, June.
    2. Monique Jeanblanc & Peter Lakner & Ashay Kadam, 2004. "Optimal Bankruptcy Time and Consumption/Investment Policies on an Infinite Horizon with a Continuous Debt Repayment Until Bankruptcy," Mathematics of Operations Research, INFORMS, vol. 29(3), pages 649-671, August.
    3. Wang, Hao & Siu, Tak Kuen & Hu, Shujie & Wang, Ning, 2024. "Life-cycle model with subsistence consumption constraint and state-dependent utilities," The North American Journal of Economics and Finance, Elsevier, vol. 73(C).
    4. Bayraktar, Erhan & Yao, Song, 2017. "Optimal stopping with random maturity under nonlinear expectations," Stochastic Processes and their Applications, Elsevier, vol. 127(8), pages 2586-2629.
    5. Zhou Yang & Gechun Liang & Chao Zhou, 2017. "Constrained portfolio-consumption strategies with uncertain parameters and borrowing costs," Papers 1711.02939, arXiv.org, revised Dec 2018.

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