Open AccessThe Problem of Heterogeneity withinRisk Weights: Does Basel IV containthe Solution?
Author(s) -
Christina Binder,
Othmar M. Lehner
Publication year - 2019
Publication title -
acrn journal of finance and risk perspectives
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.122
H-Index - 2
ISSN - 2305-7394
DOI - 10.35944/jofrp.2019.8.1.012
Subject(s) - risk weighted asset , basel ii , portfolio , basel iii , risk adjusted return on capital , capital requirement , economics , operational risk , basel i , capital (architecture) , econometrics , actuarial science , risk management , financial economics , finance , microeconomics , capital formation , profit (economics) , archaeology , incentive , financial capital , history
The article uses a bank’s credit data to study the impact of the Basel IV regulations on risk weight density (RWD). The analysis of the simulated data shows mixed results, as the improvement of risk weight heterogeneity is restricted to optimistically valued portfolios. Conservatively valued portfolios are likely to be confronted with an RWD decrease. However, within these portfolios, risk weight heterogeneity usually does not play an important role. Out of all the analysed Basel IV rules, the output floor clearly has the biggest influence on risk weight density, while the effect of the input floors is very limited within optimistically valued portfolios and is even eliminated by the removal of the scaling factor within conservatively valued portfolios. The change in RWD will also lead to a concurrent change in risk-weighted assets and therefore also in the level of eligible capital. The findings within the retail portfolio confirm those of the EBA study, which already suggested that Basel IV and especially the output floor will lead to a significant increase of risk capital (European Banking Authority, 2018).