# Tier 1 leverage ratio

Tier 1 leverage ratio |
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The **Tier 1 leverage ratio** is a measure of the capital adequacy of a bank. It is calculated as the ratio of Tier 1 capital to a bank's total exposure, which is the sum of its on-balance sheet assets and off-balance sheet exposures. Tier 1 capital is the core capital of a bank, which consists of equity and disclosed reserves. It is used to measure the bank's ability to absorb losses and is a key indicator of its financial strength.

## Example of Tier 1 leverage ratio

A bank has total exposure of $200 million and Tier 1 capital of $50 million. The Tier 1 leverage ratio would be calculated as follows\[\begin{equation} Tier \ 1 \ Leverage \ Ratio = \frac{50 \ million}{200 \ million}= 0.25 \end{equation}\]

Therefore, the Tier 1 leverage ratio for the bank is 0.25.

In conclusion, the Tier 1 leverage ratio is a measure of the capital adequacy of a bank. It is calculated as the ratio of Tier 1 capital to a bank's total exposure and is used to determine the amount of capital a bank must maintain in order to protect itself against potential losses. A higher ratio indicates a higher level of capital adequacy.

## Formula of Tier 1 leverage ratio

Tier 1 leverage ratio = Tier 1 Capital/Total Exposure

The formula of Tier 1 leverage ratio is used to calculate the ratio of Tier 1 capital to a bank's total exposure. Tier 1 capital consists of equity and disclosed reserves and total exposure is the sum of a bank's on-balance sheet assets and off-balance sheet exposures. A higher ratio indicates a higher level of capital adequacy and is used by regulators to determine the amount of capital a bank must maintain.

## When to use Tier 1 leverage ratio

The Tier 1 leverage ratio is used by regulators and investors to assess the financial health of a bank. It is also used to assess the risk profile of a bank and to ensure that the bank is able to absorb losses and remain solvent. It is also used by investors to make decisions about investing in a bank.

The Tier 1 leverage ratio is an important measure of capital adequacy for banks and is used by regulators to ensure that banks are able to meet their obligations and remain solvent. It is a key indicator of the financial strength of a bank and is used by investors to make decisions about investing in a bank. The Tier 1 leverage ratio is an important metric that should be monitored closely by regulators and investors.

## Types of Tier 1 leverage ratio

**Standardized approach**: This approach is based on the Basel III Pillar 1 framework and is used by most banks and regulators. Under this approach, the Tier 1 leverage ratio is calculated as the ratio of Tier 1 capital to the sum of on-balance sheet assets and certain off-balance sheet exposures.**Advanced approaches**: This approach is based on the Basel III Pillar 2 framework and is used by banks that want to use their own internal models and risk metrics to calculate their capital requirements. Under this approach, the Tier 1 leverage ratio is calculated as the ratio of Tier 1 capital to the sum of on-balance sheet assets and all off-balance sheet exposures.

## Steps of Tier 1 leverage ratio

- To calculate the Tier 1 leverage ratio, first the Tier 1 capital of the bank must be calculated. This is the core capital of the bank, which consists of equity and disclosed reserves.
- The total exposure of the bank must then be calculated. This is the sum of the bank’s on-balance sheet assets and off-balance sheet exposures.
- The ratio of Tier 1 capital to total exposure is then calculated, giving the Tier 1 leverage ratio.

## Advantages of Tier 1 leverage ratio

- It measures the bank's ability to absorb losses in the event of a financial crisis.
- It is a key indicator of financial strength and stability.
- It is easy to calculate and requires only basic financial information.

## Limitations of Tier 1 leverage ratio

- The Tier 1 leverage ratio does not take into account the risk profile of a bank's assets, so it may not accurately reflect the true capital adequacy of the bank.
- The ratio does not take into account the quality of the bank's capital, as it does not differentiate between core and non-core capital.
- The ratio may be misleading in times of economic stress, as it does not take into account the potential losses a bank may incur due to market volatility.

**Risk-based capital ratios**: Risk-based capital ratios measure the amount of capital a bank must maintain in order to protect itself against potential losses. These ratios are typically calculated as a percentage of the bank’s total assets or total liabilities.**Leverage ratios**: Leverage ratios measure the amount of debt relative to the bank’s equity capital. This measure is used to assess the bank’s ability to withstand losses and is an important indicator of financial strength.

The Tier 1 leverage ratio is an important measure of capital adequacy used by regulators to ensure that banks have sufficient capital to cover any potential losses. It is calculated as the ratio of Tier 1 capital to a bank's total exposure, which is the sum of its on-balance sheet assets and off-balance sheet exposures. Risk-based capital ratios and leverage ratios are also related to the Tier 1 leverage ratio and are used to assess a bank's financial strength.

## Suggested literature

- D'Hulster, K. (2009).
*The leverage ratio: A new binding limit on banks*. - Brei, M., & Gambacorta, L. (2014).
*The leverage ratio over the cycle*. - D’Hulster, K. (2009).
*The leverage ratio*. The World Bank Group, Financial and Private Sector Development Vice Presidency, Note, (11).