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Education Briefing Property investment: portfolio modelling

Michael Patrick (Real Estate Consultant, Oxford, UK)
Nick French (Real Estate Valuation Theurgy, Frilsham, UK)

Journal of Property Investment & Finance

ISSN: 1463-578X

Article publication date: 27 February 2023

Issue publication date: 27 March 2023




The aim of this briefing is to look at the often overlooked impact of gearing (or leverage) on risk. The positive impact on equity return in a strong market is gained by increasing the overall risk of the investment and potentially negative impacts on returns in weak markets.


This Education Briefing is an explanation of how the addition of individual assets to a portfolio can, with gearing, impact upon the portfolio risk/return profile.


Through a simple example, this briefing shows how geared portfolios can struggle in poor markets when the servicing of the debt (at increased interest rates) can have a severe negative impact upon returns.

Practical implications

The process of borrowing at a bank rate below the return rate on an investment project can increase the equity return of the project as long as all incomes and interest rate remain at appropriate levels but when incomes fall or disappear and/or interest rates rise, the implication for the assets return and/or solvency can be highly significant.


This is a review of existing models.



Patrick, M. and French, N. (2023), "Education Briefing Property investment: portfolio modelling", Journal of Property Investment & Finance, Vol. 41 No. 2, pp. 269-275.



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