30 years: Macroeconomist
In the final video of his series, Amit Kara outlines the scope and objectives of a climate stress test exercise. He then summarises the climate scenarios that have been used by these central banks for their climate stress test exercises.
In the final video of his series, Amit Kara outlines the scope and objectives of a climate stress test exercise. He then summarises the climate scenarios that have been used by these central banks for their climate stress test exercises.
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17 mins 38 secs
Stress tests are conducted by financial institutions or regulators to assess the resilience of financial institutions or the financial system as a whole. As banks begin to wake up to the climate crisis, they have embarked on stress tests that specifically focus on climate risks. It is vital to understand the scope and objectives of a climate stress test exercise before conducting one. Lack of action in this area or conducting a stress test too late often comes with consequences such as increased damage and costs.
Key learning objectives:
Understand the objectives and scope of a climate stress test
Comprehend the climate scenarios used by banks for a climate stress test
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Physical risks, examples of which are heat waves, flooding, droughts, wildfires and tropical cyclones, are at their minimum when the Paris climate targets are met which, according to these scenarios, is achieved if net CO2 emissions drop to zero by 2050. Put differently, physical risks are minimised when governments intervene with timely policies that help engineer a transition towards renewables and away from fossil fuels. Physical risks will be high when governments do little to decarbonise the economy.
Early action results in a net GDP loss of between 1.2-1.8% ; the cost of late action is around three times larger and the cost of doing nothing could be as high as 10% in Europe and the USA and around 15% in China. To summarise, the first important finding of these scenarios is that the cost in terms of output loss of early action is relatively low and the cost is high and rising when governments fail to respond in a timely manner.
The ECB analysis also shows that the probability of default of companies rises substantially under the ‘no additional action’ scenario mainly because of the increased frequency and intensity of extreme weather events which of course is an example of physical risks.
The need for climate stress tests was recognised as early as 2016 at the European level by the European Systemic Risk Board and at the global level by the Financial Stability Board in 2017.
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