## What is 'Exposure At Default (EAD)'

Exposure at default (EAD) is the total value a bank is exposed to at the time of a loan’s default. Using the internal ratings-based (IRB) approach, financial institutions calculate their risk. Banks often use internal risk management default models to estimate respective EAD systems. Outside of the banking industry, EAD is known as credit exposure.

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## BREAKING DOWN 'Exposure At Default (EAD)'

EAD is the predicted amount of loss a bank may be exposed to when a debtor defaults on a loan. Banks often calculate an EAD value for each loan and then use these figures to determine their overall default risk. EAD is a dynamic number, which changes as a borrower repays the lender.

There are two different methods to determine exposure at default. Regulators use the first approach, which is called foundation internal ratings-based (F-IRB). The second method, called advanced internal ratings-based ​​​​​​​(A-IRB), is more flexible and used by the banking institutes. Banks must disclose their risk exposure. A bank will base this figure on data and internal analysis, such as borrower characteristics and product type.  Exposure at default, along with loss given default (LGD) and the probability of default (PD), is used to calculate the credit risk capital of financial institutions.

## Probability of Default and Loss Given Default

The probability of default (PD) analysis is a method used by larger institutions to calculate their expected loss. A PD is assigned to each risk measure and represents as a percentage the likelihood of default. PD is typically measured by assessing past-due loans.  PD is typically calculated by running a migration analysis of similarly rated loans. The calculation is for a specific time frame and measures the percentage of loans that default. The PD is then assigned to the risk level, and each risk level has one PD percentage.

Loss given default (LGD), unique to the banking industry or segment, measures the expected loss and is shown as a percentage. LGD represents the amount unrecovered by the lender after selling the underlying asset if a borrower defaults on a loan. An accurate LGD variable may be difficult to determine if portfolio losses differ from what was expected. Inaccurate loss given default may also be due to the segment being statistically small. Industry LGDs are typically available from third-party lenders.

Also, PD and LGD numbers are typically valid throughout an economic cycle. However, lenders will reevaluate with changes to the market or portfolio composition. Changes that may trigger revaluation include economic recovery, recession, and mergers.

A bank may figure its expected loss by multiplying, the variable, exposure at default (EAD), with the probability of default (PD), and the loss given default (LGD).E (EAD x PD x LGD = expected loss).

## Why Exposure at Default is Important

In response to the credit crisis of 2007-2008, the banking sector adopted international regulations to lessen their exposure to default. The Basel Committee on Banking Supervision's goal is to improve the banking sector's ability to deal with financial stress. Through improving risk management and bank transparency, the international accord hopes to avoid a domino-effect of failing financial institutions.

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