Stress testing

We use stress testing to assess the health of UK banks, building societies and insurers.

What is stress testing?

We need to make sure banks and insurance companies are strong enough to withstand another financial crisis. So we set them ‘stress tests’ to find out if they are prepared for the worst.

A video about Stress-testing.

  • Hi my name is Noor and I work at the Bank of England. Here at the Bank of England, we need to keep an eye on how banks would cope with difficult economic situations. We do this by stress testing banks, against various hypothetical scenarios. The Bank of England then ensures that should these situations occur, banks hold sufficient capital to meet unexpected losses.

    From 2016, we will use two ‘what if’ scenarios to test banks. The first will be a yearly test of shock scenarios of different levels of severity, based on the UK current economic cycle. The annual cyclical scenario could include falls in output or house prices or increases in interest rates or unemployment. The second will be an exploratory scenario every two years. This scenario will look at risks that are unlikely to happen but are still a concern, for example what might happen if a large bank fails. Banks have always been required to hold a minimum amount of capital to absorb losses, but from 2016 how the Bank of England looks at stress test performance is changing. With larger and more risky banks needing to carry more loss absorbing capital.

    Should a bank not perform satisfactorily, the Bank of England has a range of powers, such as requiring the bank to take action to strengthen its capital position within a certain period of time.

Stress testing: banks and building societies

Banking stress tests assess how banks can cope with severe economic scenarios. We look at banks’ resilience, making sure they have enough capital to withstand extreme shocks and are able to support the economy.

Stress testing of banks: an introduction

Types of banking stress test

There are three types of banking stress test:

  1. We run an annual concurrent stress test of the largest UK banks and building societies. This informs the setting of capital buffers by our Financial Policy Committee and our Prudential Regulation Authority (PRA).?
  2. Firms that are not part of this annual stress test must carry out their own stress testing. The PRA publishes a scenario every six months to serve as a guide for banks and building societies designing their own scenarios.
  3. Every other year, we run an additional scenario intended to probe the resilience of the banking system to risks that may not be neatly linked to the financial cycle – the biennial exploratory scenario.

Annual concurrent stress test

We published the results of the 2019 stress test of the UK banking system on 16 December 2019.

We cancelled the 2020 annual stress test?to help lenders focus on meeting the needs of UK households and businesses via the continuing provision of credit.

Instead, in May 2020 we published the results of a desktop stress test Opens in a new window?of major UK banks and building societies using the economic scenario outlined in the May 2020 Monetary Policy Report.

In August 2020 we carried out a ‘reverse stress test Opens in a new window’. This analysed how much worse than the central projection the economic outcome would need to be in order to deplete regulatory capital buffers by as much as in the 2019 stress test.

Data templates for the 2019 Concurrent Stress Testing exercise?

We publish Concurrent Stress Testing exercise data requirements to participating firms for submission in Excel and in XBRL.

These Excel templates?will be used for data submissions by firms subject to the 2019 Concurrent Stress Testing exercise. They have been provided directly to participating firms.

Data templates and dictionary for the 2021 Solvency Stress Test

We publish Solvency Stress Test data requests to participating firms, for submission in Excel. These Excel templates and dictionary are for data submissions by firms subject to the 2021 Solvency Stress Test.

A summary of the Bank of England 2021 Solvency Stress Test data request, an overview of the main changes since the previous version, and the operating model for the reporting of stress test data by participating firms can be found below:

The asset liability management template below is not submitted as part of the concurrent stress test, but feeds into our stress test analysis.

XBRL taxonomy for the 2020 Concurrent Stress Testing exercise

The link below contains the final version of the XBRL taxonomy, annotated templates and dictionary for the 2020 Concurrent Stress Testing exercise.

How to use our stress scenario

You should consider the relevance of our stress test scenarios in the context of your business and its own risks.?

You should use our scenario as a starting point to design adequately severe scenarios for your firm under Pillar 2. We know any single scenario which is designed for firms with different business models and risks, has its limits. We expect you to choose a scenario that provides a strong challenge for your business.?

You are responsible for developing your own scenarios to test your firm's resilience. Large banks and building societies should use the annual cyclical scenario.??

Firms who are subject to IFRS 9 should consider the following clarifications covering the expected approach to IFRS 9 within ICAAPs.

Historical guidance

Scenarios for banks and building societies not part of concurrent stress testing

We have taken a range of supervisory and policy measures to address the challenges of Covid-19, including the cancellation of the annual stress test (ACS) for systemic firms and increased emphasis on buffer usability.

Following the cancellation of the ACS, the PRA is not publishing the related stress scenarios for non-systemic firms.

In line with Supervisory Statement 31/15 ‘The Internal Capital Adequacy Assessment Process (ICAAP) and the Supervisory Review and Evaluation Process (SREP)’, ICAAPs should be updated and stress testing undertaken at least annually.

The PRA expects firms’ to consider and develop appropriate internal stress scenarios for their own use of stress testing, and more widely as a risk management tool.

Firms may wish to consider the May 2020 scenario published in the Monetary Policy Report?on 7 May 2020, particularly in terms of its shape, but should consider more severe variations of this or alternative scenarios.

Firms should also continue to refer to the PRA’s most recently published 2019 annual stress scenario for non-systemic firms as a benchmark for severity. Given the current economic outlook, firms may consider adjusting the change in the economic variables of the 2019 scenario, in line with our?October 2015 stated approach to stress testing Opens in a new window.

This guidance is aimed at helping firms develop scenarios for risk management purposes, rather than solely for internal buffer assessments.

Given the current economic climate, stress testing remains an important supervisory tool to inform our understanding of the resilience of the sector.

Therefore our capital SREP assessments will have an additional emphasis on firms’ use of stress testing to understand their business model vulnerabilities and suite of mitigating actions. This will include an increased focus on reverse stress testing.

Firms should carefully consider the economic and idiosyncratic variables, and levels of stress severity that would lead to a breach of Total Capital Requirements. This should include consideration of a combination of variables within an overall coherent scenario.

We published our most recent scenarios on 28 March 2019. They are here:

ICAAP scenario

The results of stress tests are an important consideration when we decide how to set capital requirements for banks and building societies.?

Read our guidance on the role of stress testing in our Supervisory Statement?on the internal capital adequacy assessment process and the supervisory review and evaluation process.

Biennial exploratory scenario

Since 2017, we have also run a second type of concurrent stress test. Conducted every other year, this is known as the ‘biennial exploratory scenario’ (BES). Its focus changes from exercise to exercise, and is designed to explore risks facing banks not covered by the annual bank solvency focused test. Previous tests have covered risks from persistently low interest rates and liquidity risks.

The 2021 Climate Biennial Exploratory Scenario

The 2021 BES will cover risks to the UK financial sector from climate change. ln December 2019, we published a discussion paper?outline its intentions for the exercise.

Information on which institutions will be participating in the exercise, the timeline, and our planned engagement with participants in the period up to launching the exercise in June 2021 can be found in our CBES announcement ‘The Bank of England is restarting the Climate Biennial Exploratory Scenario (CBES)’.

The aim of our early engagement is to reduce the burden on participants by improving their readiness for the exercise. As part of that, information about several key areas where the Bank has revisited the proposed approach described in the 2019 Discussion Paper Opens in a new window Opens in a new window, including in response to feedback on that paper, along with an indicative list of variables to be provided as part of the CBES scenarios can be found in our CBES announcement ‘Update on the Bank’s approach to the Climate Biennial Exploratory Scenario in selected areas’ Opens in a new window.

Stress testing: insurers

Insurers should develop, implement and action an effective stress testing programme. Stress testing should assess their ability to meet capital and liquidity requirements in stressed conditions, as a key component of effective risk management. All firms should undertake relevant analysis, equal to the nature, scale and complexity of their business.

The PRA also runs its own stress tests on a periodic basis for a number of insurance firms. It does this regularly for specific high-impact firms and others as the need arises. This assesses their ability to meet minimum stated capital levels throughout a stress period.?

System-wide stress testing will be used by firms using a common scenario for financial stability purposes. To support its framework, the PRA sets policy for firms' stress testing requirements and stress scenarios, monitoring test results.

On Wednesday 17 June 2020 the PRA published a letter to participating general and life insurers?on feedback for general and life insurers from the 2019 Insurance Stress Test.

Reverse stress tests

The PRA also expects insurance firms to apply reverse stress testing as part of their own risk and solvency assessment (ORSA) process, to continuously assess their overall solvency needs for their insurance specific risk profile.

Reverse stress tests are stress tests that require a firm to assess scenarios and circumstances that would make its business model unworkable, identifying potential business vulnerabilities.?

This differs from typical stress and scenario testing, which tests for outcomes arising from changes in circumstances. A firm's business model is described as being unrealistic at the point when forming risks cause the market to lose confidence in the firm.

Reverse stress testing is designed to be a risk management tool, encouraging firms to explore the vulnerabilities and faults in its business model, including tail risks. Tail-risk is the risk, or probability, of rare insured events occurring in the future.?

The PRA works with others in the EU and internationally on approaches to stress testing.

Stress testing updates

  • 18 September 2020: Jointly with the Bank of England, Financial Conduct Authority, Competition & Markets Authority, Payment Systems Regulator, Information Commissioner’s Office, Pensions Regulator, and HM Treasury (as observer member), we published an updated version of the Regulatory Initiatives Forum’s?grid – a consolidated plan of initiatives that the authorities consider will, or may, have significant operational impact on firms across the next 24 months.

    17 June 2020: We published a letter to participating general and life insurance firms on feedback for general and life insurers from the 2019 Insurance Stress Test.

    7 May 2020: Jointly with the Bank of England, Financial Conduct Authority, Competition & Markets Authority, Payment Systems Regulator and HM Treasury (as observer member), we published the Regulatory Initiatives Forum’s?first grid?– a consolidated plan of initiatives that the authorities consider will, or may, have significant operational impact on firms across the next 12 months.

    7 May 2020:?We published a?statement announcing further details of our plans to support firms we regulate?and enable them to focus resources on the highest priority work in light of Covid-19

    20 March 2020:?We announced the cancellation of our 2020 annual stress test and amendments to the biennial exploratory scenario timetable.

  • June 2019

    On 18 June 2019 the PRA published a letter and accompanying materials on the Insurance Stress Test 2019?which asks the largest regulated life and general insurers to provide information about the impact of a range of stress tests on their business. In addition, the stress test includes an exploratory exercise in relation to cyber underwriting and climate change. The set of climate scenarios explores the impacts to both firms' liabilities and investments stemming from physical and transition risks.?The PRA will publish a summary of the overall results but no individual firm results will be made public. The deadline for submission is as follows:

    • Sections A and B: 5pm, Monday 30 September 2019
    • Section C: 5pm, Thursday 31 October 2019
  • December 2018

    On 14 December EIOPA published its results report of the insurance stress test exercise. More information on the stress tests and timescales can be found on EIOPA's website.

    July 2018

    Systemic Risk Buffers and Pillar 2A in stress test hurdle rates. In ‘Key elements of the 2018 stress test’ March 2018, the Bank of England noted its intention to change the way hurdle rates are calculated in the annual stress test in four ways. This statement provides further specific details on two of these changes.

    May 2018

    EIOPA launched its third Solvency II based stress test for insurers on 14 May 2018. EIOPA conducts biennial stress tests to help scale the impact on insurance companies of the crystallisation of various economic and non-economic risks. As in previous years, there is no pass/fail hurdle rate in the 2018 exercise but this year’s exercise will be focused on groups. More information on the stress tests and timescales can be found on EIOPA’s website.

    April 2018

    On Monday 30 April we published PS7/18 ‘Model risk management principles for stress testing’?and PS8/18 ‘Pillar 2: Update to reporting requirements’. Both publications are of interest to banks, building societies and PRA-designated investment firms.

  • December 2017

    On Thursday 7 December, Anna Sweeney, Director of Insurance, sent a letter to CEOs of participating firms on the 'General Insurance Stress Test 2017 Feedback’. This followed our request in April 2017 to the United Kingdom’s largest general insurers to participate in a stress test exercise (see April 2017 update below). We’d like to thank all insurers that were requested to participate in this exercise for their submission.

    On Wednesday 6 December, we published CP25/17 ‘Pillar 2: Update to reporting requirements’?and CP26/17 ‘Model risk management principles for stress testing’. Both consultations are of interest to banks, building societies and PRA-designated investment firms, and close on Tuesday 6 March 2018.

    April 2017

    On Friday 21 April The PRA published the 2017 stress test scenario for firms not participating in the 2017 concurrent stress test.

    General insurance stress test 2017

    On Tuesday 11 April the PRA sent a request to the United Kingdom's largest general insurers to provide information about the impact of a range of stress tests on their projected Own Funds, as well as providing additional information on their sectoral exposures to the UK economy.

    The General Insurance Stress Test 2017 (GIST 2017) exercise is split into two broad areas of interest:

    Section 1: a set of five severe but conceivable scenarios (four natural catastrophe scenarios and one economic downturn scenario consistent with the Banking Stress Test).

    Section 2: a capture of exposures that will allow the PRA to better understand the impact of potential losses by various sectors of the economy.

    Submission of the completed Excel template by the participating firms is requested by 17:00 on Friday 14 July 2017.

    The materials related to the GIST 2017 are listed below:

    PDF General Insurance Stress Test 2017 - Scenario Specification, Guidelines and Instructions

    Excel General Insurance Stress Test 2017 - Template?

    General Insurance Stress Test 2017 - letter to participating firms (for information)

    March 2017

    On 27 March 2017, the PRA issued a letter on?Stress test model management principles for firms participating in the 2017 concurrent stress test.


  • December 2016

    On Thursday 15 December EIOPA published its report of the EIOPA insurance stress test. The PRA will take forward the EIOPA recommendations with UK insurers as appropriate.

    More information on the stress tests and timescales can be found on EIOPA's website.

    EIOPA Insurance test 2016

This page was last updated 16 December 2020

Give your feedback

Was this page useful?
Add your details...