Perturbation analysis for investment portfolios under partial information with expert opinions

J. P. Fouque, A. Papanicolaou, R. Sircar

Research output: Research - peer-reviewArticle

Abstract

We analyze the Merton portfolio optimization problem when the growth rate is an unobserved Gaussian process whose level is estimated by filtering from observations of the stock price. We use the Kalman filter to track the hidden state(s) of expected returns given the history of asset prices, and then use this filter as input to a portfolio problem with an objective to maximize expected terminal utility. Our results apply for general concave utility functions. We incorporate time-scale separation in the uctuations of the returns process, and utilize singular and regular perturbation analysis on the associated partial-information HJB equation, which leads to an intuitive interpretation of the additional risk caused by uncertainty in expected returns. The results are an extension of the partially informed investment strategies obtained by the Black-Litterman model, wherein investors' views on upcoming performance are incorporated into the optimization along with any degree of uncertainty that the investor may have in these views.

LanguageEnglish (US)
Pages1534-1566
Number of pages33
JournalSIAM Journal on Control and Optimization
Volume55
Issue number3
DOIs
StatePublished - 2017

Fingerprint

Expert Opinion
Partial Information
Perturbation Analysis
Uncertainty
HJB Equation
Portfolio Optimization
Concave function
Stock Prices
Utility Function
Gaussian Process
Kalman Filter
Intuitive
Time Scales
Filtering
Maximise
Filter
Optimization Problem
Optimization
Model
Strategy

Keywords

  • Control
  • Expert opinions
  • Filtering
  • Hamilton-Jacobi-Bellman equation
  • Partial information
  • Portfolio optimization

ASJC Scopus subject areas

  • Control and Optimization
  • Applied Mathematics

Cite this

Perturbation analysis for investment portfolios under partial information with expert opinions. / Fouque, J. P.; Papanicolaou, A.; Sircar, R.

In: SIAM Journal on Control and Optimization, Vol. 55, No. 3, 2017, p. 1534-1566.

Research output: Research - peer-reviewArticle

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