Estimating LGD correlation

Arbeitspapier

The paper proposes a new method to estimate correlation of account level Basle II Loss Given Default (LGD). The correlation determines the probability distribution of portfolio level LGD in the context of a copula model which is used to stress the LGD parameter as well as to estimate the LGD discount rate and other parameters. Given historical LGD observations we apply the maximum likelihood method to estimate the best correlation parameter. The method is applied and analyzed on a real large data set of unsecured retail account level LGDs and the corresponding monthly series of the average LGDs. The correlation estimate comes relatively close to the PD regulatory correlation. It is also tested for stability using the bootstrapping method and used in an efficient formula to estimate ex ante one-year stressed LGD, i.e. one-year LGD quantiles on any reasonable probability level.

Object Details

• Language: Englisch

References and Relationships

• Bibliographic citation: Series: IES Working Paper ; No. 21/2009

Classification and Topics

• Classification: Wirtschaft ; Banks; Depository Institutions; Micro Finance Institutions; Mortgages ; Financial Institutions and Services: Government Policy and Regulation ; Semiparametric and Nonparametric Methods: General
• Subject: credit risk ; recovery rate ; loss given default ; correlation ; regulatory capital ; Kreditrisiko ; Basler Akkord ; Korrelation

Contributors, Places and Time

• Event: Geistige Schöpfung
• (who): Witzany, Jiří
• Event: Veröffentlichung
• (who): Charles University in Prague, Institute of Economic Studies (IES)
• (where): Prague
• (when): 2009

Further information

• Handle: http://hdl.handle.net/10419/83466
• Last update: 10.03.2025, 11:44 AM CET