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6 - Data needs for stress-testing

from Part I - Fundamentals

Published online by Cambridge University Press:  18 December 2009

Mario Quagliariello
Affiliation:
European Banking Authority, London
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Summary

Introduction

As in the case of any other economic application, stress tests depend heavily on data. The aim of this chapter is to provide an overview of what the main information needs are for stress-testing purposes.

In Chapter 2 of this book, it is pointed out that stress tests can be carried out at the level of individual institutions, groups of institutions or the financial system as a whole. They may be used by central banks and supervisory authorities to assess the stability of the financial system or by individual banks in order to design appropriate capital planning and/or identify weaknesses in their risk management systems. In all cases it is necessary to identify the types of data needed for the exercise.

As discussed in the following sections, information needs can vary significantly and depend on several factors, such as the complexity of the simulation, the technical skills available at the institutions and the type of risk which is to be investigated. First, the distinction between sensitivity analyses, based primarily on an isolated change in an input variable, and scenario analyses, which are based on more complex interactions of risk variables and can potentially capture different types of risk, can matter significantly. Second, data inputs depend on whether the simulation is based on historical experience or hypothetical assumptions. In the latter case, data should be combined with expert judgment.

Type
Chapter
Information
Stress-testing the Banking System
Methodologies and Applications
, pp. 99 - 116
Publisher: Cambridge University Press
Print publication year: 2009

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