The review of the open challenges in the IRB loan portfolio credit risk modeling

2020 ◽  
Vol 15 (4) ◽  
pp. 371-388
Author(s):  
Henry Penikas

The Basel Committee on Banking Supervision finalized the Basel III accord in the December 2017 and launched the set of its standards – the Basel Framework – in December 2019. Both documents allow bank to use mathematical models for the credit risk estimation. There are quantitative and qualitative requirements for models to be allowed for use in the prudential regulation of banks. The approach is called an Internal-Ratings-Based one (IRB). This paper aims at discussing a set of issues related to IRB credit risk modeling and such model estimates use. Those issues include data pooling in the credit registries, applying copula-discriminant analysis, validating the borrower concentration per grade, assigning the hybrid credit rating, use of model estimates when voting at the credit committee, estimate of the ultimate credit risk-taking by banks.

2021 ◽  
Vol 26 (3) ◽  
pp. 49-60
Author(s):  
Nenad Milojević ◽  
Srđan Redžepagić

In 2017 Basel Committee on Banking Supervision (BCBS) published additional Basel III reforms for the calculation of the risk-weighted assets (RWA) as part of the capital adequacy calculation. The 2017 reforms should resolve shortcomings in the capital adequacy calculation from the pre-crisis period. Revised standardised approach for the credit risk should be valid as of January 2023. The new reforms are bringing numerous improvements particularly interesting for the bank strategic management. One of the especially important improvements of the 2017 Basel III RWA reforms is the new treatment of the exposures to banks. For the treatment of externally unrated exposure to banks, financial institutions can use Standardised Credit Risk Assessment Approach (SCRA). This topic is the most interesting and important for the banking sectors structured mostly with the externally unrated banks. This is more characteristic of the developing, transition economies than the developed economies. However, SCRA will also be very important for the developed economies' banking sectors and banks whose portfolios are dominated by externally rated bank exposures, but in the same time they have significant amount of the exposure to banks without external rating. This paper's focus is related to the expected effects of the implementation of SCRA on the unrated banks' exposure. The aim of the paper is to define those effects. The paper is analysing how worldwide implementation of SCRA will establish a more detailed RWA approach with enhanced risk sensitivity. The research has shown that externally unrated banks with strong and stable capital adequacy and other related parameters can have positive expectations from the implementation of SCRA.


2012 ◽  
Author(s):  
Takanori Adachi ◽  
ryozo miura ◽  
Hidetoshi Nakagawa

2019 ◽  
Vol 4 (3) ◽  
pp. 39-47
Author(s):  
Larysa BATIUK

Introduction. The article deals with the peculiarities of the transmission mechanism of monetary policy in the implementation conditions of the Basel Committee requirements on Banking Supervision "Basel III". The problem of the mechanism violation of the classical monetary multiplier, the imbalance of the monetary circulation system, the frequency increase of debt defaults and the amplitude of macroeconomic fluctuations in the global economic system are marked as a study result of the effects of the credit mitigation policy conducted by the US Federal Reserve amid the global financial crises of the last decade and changes in the nature of financial intermediation based on the synthesis of asset securitization and structured finance instruments. The purpose of this article is to investigate changes in monetary policy and financial intermediation in the implementation context of the Basel Committee on Banking Supervision Basel III as a source of imbalance in the global economy. Research methodology. The system method, method of scientific abstraction, methods of analysis and synthesis, statistical, comparison, generalization, scientific prediction were used. Results. The article deals with the implications of implementing the Basel Committee on Banking Supervision Basel I and Basel II in the area of monetary policy and financial intermediation; peculiarities of monetary multiplier mechanism operation in modern conditions are revealed; the possible consequences of implementing Basel III requirements for the mechanism of monetary supply formation in the world economy are analysed; the change in the role of gold as monetary metal in central bank foreign exchange reserves and the implications of these changes in terms of price dynamics and the distribution of real wealth in the global economy are examined. Conclusions. It is proposed to consider the requirements of the Basel Committee on Banking Supervision "Basel III" as such, which will exacerbate the volatility of global financial markets, increase the likelihood of increasing the frequency of debt defaults and, given the possibility of using gold as a means of redistribution of real wealth in the global economy, will cause an increase in the amplitude of macroeconomic fluctuations. Keywords: monetary policy; financial intermediation; the central bank; US Federal Reserve; Basel III; bank capital structure, monetary base; money multiplier, correspondent accounts; money supply; monetary gold; global economy.


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