Modelling probability of default and optimal PTI level by using a household survey

Balás, Tamás and Banai, Ádám and Hosszú, Zsuzsanna (2015) Modelling probability of default and optimal PTI level by using a household survey. Acta Oeconomica, 65 (2). pp. 183-209. ISSN 0001-6373

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Abstract

The risks of household lending are still a major issue in Hungarian banking. The proportion of non-performing loans is rising continuously. We constructed a model to find those factors which have significant effect on the probability of default of households’ mortgages. We also used this model to calibrate the optimal level of household mortgages’ payment-to-income ratios, which is important from a regulatory point of view. Our results show that the denomination of the loan and the indebtedness of the household are crucial factors in the performance of the loan. We also show that loans contracted via agents are riskier than others. The results carry two important messages from a regulatory perspective. Prescribing the same payment-to-income (PTI) ratios for HUF and FX loans may be unnecessarily restrictive for the former and excessively permissive for the latter. The uniform regulation of households with different income levels may also lead to undesired anomalies.

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