The purpose of this paper is twofold: first, it derives the optimal loan-to-value (LTV)-ratio for a mortgagor that maximizes the return to home equity when considering the capital structure of housing investment. Second, it analyses the demand-side contribution to mortgage market variability across monetary policy regimes.
The paper endogenizes both the relation between the LTV ratio and the mortgage rate and the relation between LTV and the rate of appreciation. When we consider LTV-variance and the demand-side contribution to mortgage market variability, three stylized regimes is considered.
The paper finds an intuitive ranking of the optimal LTV-ratios across regimes, and the optimal LTV-ratio peaks during a housing boom. When, however, monetary policy ignores asset inflation the demand-side contribution to market variability is highest during normal market conditions. Hence, there is a potentially hump-shaped relation between the risk exposure of individual mortgagors and the demand-side contribution to mortgage market variability.
The paper finds a potentially hump-shaped relation between the risk exposure of individual mortgagors and the demand-side contribution to mortgage market variability, which, to the best of our knowledge, is novel. The paper shows how macro-prudential and monetary policy are complementary tolls for preserving financial stability.
Borgersen, T.A. (2017), "The optimal LTV-ratio, mortgage market variability and monetary policy regimes: A demand-side perspective", Journal of Financial Economic Policy, Vol. 9 No. 02, pp. 225-239. https://doi.org/10.1108/JFEP-06-2016-0044
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