Conditions for optimality in the infinite-horizon portfolio-cum-saving problem with semimartingale investments

Foldes, Lucien (1989) Conditions for optimality in the infinite-horizon portfolio-cum-saving problem with semimartingale investments. Financial Markets Group Discussion Papers (53). Financial Markets Group, The London School of Economics and Political Science, London, UK.

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Abstract

A model of optimal accumulation of capital and portfolio choice over an infinite horizon in continuous time is formulated in which the vector process representing returns to investments is a general semimartingale. Methods of stochastic calculus and calculus of variations are used to obtain necessary and sufficient conditions for optimality involving martingale properties of the ‘shadow price’ processes associated with alternative portfolio-cum-saving plans. The relationship between such conditions and ‘portfolio equations’ is investigated. The results are applied to special cases where the returns process has stationary independent increments and the utility function has the ‘discounted relative risk aversion’ form.

Item Type:	Monograph (Discussion Paper)
Official URL:	http://fmg.lse.ac.uk
Additional Information:	© 1989 The Author
Divisions:	Systemic Risk Centre
Subjects:	H Social Sciences > HG Finance H Social Sciences > HB Economic Theory Q Science > QA Mathematics
JEL classification:	G - Financial Economics > G1 - General Financial Markets > G11 - Portfolio Choice; Investment Decisions
Date Deposited:	29 May 2008 09:46
Last Modified:	11 Dec 2024 18:17
URI:	http://eprints.lse.ac.uk/id/eprint/5142

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