+Contents
---+1. Subject matter
---+2. Scope and level of application
------+1. Competent authorities should require institutions to comply with the provisions laid down in …
------+2. These guidelines should apply to institutions using an Internal Model Approach (IMA) for the …
------+3. The guidelines apply to institutions at the level (solo and/or consolidated) on which the model …
---+3. Definitions
---+4. Length of the stressed period
------+1. The requirement set out in the CRD that the historical data used to calibrate the Stressed VaR …
------+2. The approach to be applied to identify the stressed period in order to meet the requirement of …
---+5. Number of stressed periods to use for calibration
------+1. For the purposes of approval of the choice of the stressed period by institutions, a competent …
------+2. When the competent authorities approve the stressed period defined at group level according to …
------+3. As an exception from the above, the competent authorities should require an EU institution to …
---+6. The approach for identifying the appropriate historical period
------+1. In order to choose a historical period for calibration purposes, institutions should formulate a …
------+2. A judgement-based approach is one that does not use a detailed quantitative analysis to identify …
------+3. A formulaic approach instead is one that applies, in addition to expert judgement, a more …
------+4. This approach should be employed to determine a historical period that would provide a …
------+5. While either approach may be used by institutions, the use of the formulaic approach, where …
------+6. Institutions may also combine the above two approaches to limit the computational burden of the …
------+7. Irrespective of the approach used, institutions should provide evidence that the stressed period …
------+8. In all cases no weighting of historical data should be applied when determining the relevant …
------+9. Finally, competent authorities may require institutions to use antithetic data when calibrating …
---+period
------+1. Irrespective of the approach applied, institutions must produce robust documentation justifying …
------+2. Where institutions apply a formulaic approach to identify the stressed period the following …
------+3. Where a formulaic approach is applied, which is based on a simplified VaR model, an institution …
------+4. Where a formulaic approach is applied, which aims at identifying the most volatile period for a …
---+8. Frequency
------+1. The requirement of the CRD, for the review of the identified 12-month period of significant …
------+2. Any changes to the choice of the historical period following the outcome of the review of the …
---+9. Monitoring the stressed period
------+1. In addition to the above-mentioned regular review, an institution should have in place …
------+2. In order to put in place sound procedures for the ongoing monitoring of the relevance of a …
------+3. In addition to the above-mentioned procedures, monitoring of Stressed VaR relative to VaR should …
---+10. Consistency with VaR methodology
------+1. The Stressed VaR methodology should be based on the current VaR methodology, with specific …
------+2. With respect to standards used in both measures, and further to the ones prescribed by the …
------+3. While the Stressed VaR model should share some of the current VaR standards, others may diverge …
------+4. Stressed VaR standards may diverge from VaR standards in other circumstances where there could …
------+5. As a general rule, changes in an institution’s VaR model or VaR methodology should be reflected …
------+6. Under exceptional circumstances, if an institution can demonstrate that it cannot incorporate …
------+7. Where sensitivities rather than full revaluation are used within a VaR model, the institution …
------+8. Any revaluation ladders or spot/volatility matrices employed should be reviewed and extended to …
------+9. In terms of calibration to market data, the process of ‘de-meaning’ is not considered necessary …
------+10. The table below summarises the main issues described above concerning the level of consistency …
---+11. Estimation of proxies for Stressed VaR
------+1. Given that the data constraints that make necessary the use of proxies for VaR, become even more …
------+2. If a risk factor is missing in the stressed period because it was not observable during that …
------+3. Institutions may alternatively map the missing factor to another one similar in terms of …
------+4. If a VaR model is enhanced by incorporating a risk factor, an institution should also …
------+5. In all cases, the use of these proxies, including simplifications and any omissions made, will …
---+12. Validation of proxies
------+1. Whereas validation of a proxy should be broadly performed in the same way for VaR and Stressed …
------+2. Regarding those proxies which might be used for Stressed VaR purposes only (for instance, due to …
---+13. Validation of model inputs/outputs
------+1. All qualitative standards defined for the control of consistency, accuracy and reliability of …
------+2. Underlyings for which institutions do not have a history of data complete enough to cover the …
------+3. With a view to preserving arbitrage inequalities, institutions may need to apply data cleaning …
------+4. As Stressed VaR entails, by definition, the application of highly stressed scenarios to current …
---+14. Use test
------+1. The Stressed VaR model should be subject to a use test through use of Stressed VaR output in …
------+2. Where Stressed VaR outputs reveal particular vulnerability to a given set of circumstances …
---+15. Date of application

Contents

III. EBA Guidelines on Stressed VaR ............................................................................. 6 Title I – Subject matter, Scope and Definitions ................................................................... 8

1. Subject matter ............................................................................................ 8 2. Scope and level of application ....................................................................... 8 3. Definitions .................................................................................................. 8 Title II – Requirements regarding institutions’ Stressed VaR modelling .................... 9

A. Identification and validation of the stressed period .................................... 9 4. Length of the stressed period ........................................................................ 9 5. Number of stressed periods to use for calibration ............................................ 9 6. The approach for identifying the appropriate historical period ......................... 10 7. Documentation to support the approach used to identify the stressed period .... 11 B. Review of the stressed period ................................................................... 12 8. Frequency ................................................................................................ 12 9. Monitoring the stressed period .................................................................... 12 C. Stressed VaR methodology ........................................................................ 13 10. Consistency with VaR methodology ............................................................ 13 11. Estimation of proxies for Stressed VaR ....................................................... 15 12. Validation of proxies ................................................................................ 16 13. Validation of model inputs/outputs ............................................................. 16 D. Use test ..................................................................................................... 17 14. Use test.................................................................................................. 17 Title III – Final Provisions and Implementation ................................................................. 17

15. Date of application ................................................................................... 17

7 Title I – Subject matter, Scope and Definitions

1. Pregled

,
Naslov Regulativa
1. Subject matter

These guidelines aim at achieving a common understanding among the competent authorities across the EU on Stressed Value at Risk (VaR) models in order to enhance convergence of supervisory practices in line with Annex V of Directive 2006/49/EC, as amended by Directive 2010/76/EU.

2. Scope and level of application

2. Scope and level of application

3. Definitions

In these guidelines the following definitions should apply:

  • a. The term institutions should mean credit institutions and investment firms as set out in Directives 2006/48/EC and 2006/49/EC.
  • b. The term antithetic data under point 6 of these Guidelines should mean price movements which are considered relevant irrespective of their direction.
  • c. The term de-meaning under point 10 of these Guidelines should mean a quantitative process to remove a trend from historical data. Depending on the positions and the size of the trend, not removing the drift from the historical data to simulate the price variations could generate mainly profitable scenarios and very few and limited losses.
  • d. The term proxy under point 11 of these Guidelines should mean an observable variable or price taken from a liquid market that is used to substitute a variable that cannot be observed (or whose hypothetical price does not reflect real transactions from a deep two-way market) and thus cannot be accurately measured. Institutions use proxies both for valuation and risk measurement purposes. From a theoretical perspective three types of proxies can be identified: those applied in the valuation of instruments (which would affect the adequacy of VaR and Stressed VaR as capital measures); those used for

8 VaR calculations (which would also be present in Stressed VaR metrics); and those affecting solely the Stressed VaR calculation.

Title II – Requirements regarding institutions’ Stressed VaR modelling

A. Identification and validation of the stressed period

4. Length of the stressed period

4. Length of the stressed period

5. Number of stressed periods to use for calibration

5. Number of stressed periods to use for calibration

6. The approach for identifying the appropriate historical period

6. The approach for identifying the appropriate historical period

period

period

8. Frequency

8. Frequency

9. Monitoring the stressed period

9. Monitoring the stressed period

10. Consistency with VaR methodology

10. Consistency with VaR methodology

11. Estimation of proxies for Stressed VaR

11. Estimation of proxies for Stressed VaR

12. Validation of proxies

12. Validation of proxies

13. Validation of model inputs/outputs

13. Validation of model inputs/outputs

14. Use test

14. Use test

15. Date of application

Competent authorities should implement these Guidelines by incorporating them within their supervisory procedures within six months after publication of the final Guidelines. Thereafter, competent authorities should ensure that institutions comply with them effectively.

17

1.1 Reference

1.2 Utvrđeni zahtjevi

1.3 Povezani standardi

2. Utvrđeni zahtjevi

Zahtjevi
Izvor Zahtjev

3. Povezani standardi

Standardi
Izvor Zahtjev
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