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Banks' concentration versus diversification in the loan portfolio : new evidence from Germany

Jahn, Nadya; Memmel, Christoph; Pfingsten, Andreas - 2013

Using a unique data set on German banks' sector specific loan exposures to the real economy and the corresponding write-offs and write-downs, we examine the impact of loan portfolio sector concentration on credit risk. By controlling for common risk factors, we separate the bank-specific...

Persistent link: https://www.econbiz.de/10010233376

Model and estimation risk in credit risk stress tests

Grundke, Peter; Pliszka, Kamil; Tuchscherer, Michael - 2019

This paper deals with stress tests for credit risk and shows how exploiting the discretion when setting up and implementing a model can drive the results of a quantitative stress test for default probabilities. For this purpose, we employ several variations of a CreditPortfolioView-style model...

Persistent link: https://www.econbiz.de/10011981523

Back to the roots of internal credit risk models : does risk explain why banks' risk-weighted asset levels converge over time?

Böhnke, Victoria; Ongena, Steven; Paraschiv, Florentina; … - 2024

The internal ratings-based (IRB) approach maps bank risk profiles more adequately than the standardized approach. After switching to IRB, banks' risk-weighted asset (RWA) densities are thus expected to diverge, especially across countries with different supervisory strictness and risk levels....

Persistent link: https://www.econbiz.de/10014467948

On a quest for robustness : about model risk, randomness and discretion in credit risk stress tests

Siemsen, Thomas - 2018

In this paper we study the impact of model uncertainty, which occurs when linking a stress scenario to default probabilities, on reduced-form credit risk stress testing. This type of uncertainty is omnipresent in most macroeconomic stress testing applications due to short time series for banks'...

Persistent link: https://www.econbiz.de/10011897976

Calculating trading book capital : is risk separation appropriate?

Raupach, Peter - 2015

Regulatory capital for trading book positions includes two components that cover different risks but apply to the same portfolio, one for market risk and one for credit risk. Similar approaches are common in banks’ internal models for economic capital. Although it is known that joint market...

Persistent link: https://www.econbiz.de/10011299075

Evaluation of minimum capital requirements for bank loans to SMEs

Düllmann, Klaus; Koziol, Philipp - 2013

Our paper addresses firm size as a driver of systematic credit risk in loans to small and medium enterprises (SMEs). Key contributions are the use of a unique data set of SME lending by over 400 German banks and relating systematic risk to the size dependence of regulatory capital requirements....

Persistent link: https://www.econbiz.de/10009751062

The rollout of internal credit risk models : implications for the novel partial-use philosophy

Schlam, Carina; Woyand, Corinna - 2023

The novel partial-use philosophy by the Basel Committee on Banking Supervision initiates a paradigm shift for banks, allowing them to permanently partially apply the internal ratings-based approach (IRBA) and not having to fully roll it out across the overall bank anymore. This raises the...

Persistent link: https://www.econbiz.de/10014227602

Synthetic leverage and fund risk-taking

Fricke, Daniel - 2021

Mutual fund risk-taking via active portfolio rebalancing varies both in the cross-section and over time. In this paper, I show that the same is true for funds' off- balance sheet risk-taking, even after controlling for on-balance sheet activities. For this purpose, I propose a novel measure of...

Persistent link: https://www.econbiz.de/10012489580

A model of mortgage losses and its applications for macroprudential instruments

Hott, Christian - 2013

We develop a theoretical model of mortgage loss rates that evaluates their main underlying risk factors. Following the … mortgage loss rates. In addition, we show potential applications of the model for different macroprudential instruments: stress …

Persistent link: https://www.econbiz.de/10010192836

Stress testing the German mortgage market

Barasinska, Nataliya; Haenle, Philipp; Koban, Anne; … - 2019

This paper presents a framework for estimating losses in the residential real estate mortgage portfolios of German …-trigger hypothesis of mortgage defaults. In order to analyse the possible credit losses stemming from residential mortgage lending we … to 2020 for the whole German banking sector. Our results show that loss rates in the residential mortgage portfolios of …

Persistent link: https://www.econbiz.de/10012012997

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