Eonia Bilateral Amendment Agreement

April 21, 2023 3:58 pm Published by

The EONIA Bilateral Amendment Agreement: What You Need to Know

The EONIA Bilateral Amendment Agreement is a recent development in the financial world that has significant implications for investors and traders alike. EONIA, or the Euro Overnight Index Average, is a benchmark interest rate used in the Eurozone to calculate the overnight cost of borrowing funds. The EONIA Bilateral Amendment Agreement aims to transition the benchmark from EONIA to the Euro Short-Term Rate (ESTR), a new interest rate benchmark introduced by the European Central Bank (ECB).

Why the Transition?

The transition from EONIA to ESTR is necessary because EONIA is based on interbank lending transactions that have been declining in recent years. The decrease in the number of transactions used to calculate EONIA has made it less reliable as a benchmark, which could lead to significant market distortions and risk. The ECB introduced ESTR as a new benchmark in 2019 to address this issue and to ensure that there is a reliable reference point for the financial markets.

What is the Bilateral Amendment Agreement?

The Bilateral Amendment Agreement is a legal document that allows counterparties to change the terms of their existing financial contracts that reference EONIA. The goal is to update these contracts to reference ESTR instead, ensuring that they are compliant with the new benchmark and avoiding any market disruptions.

The agreement is bilateral because it requires both counterparties to agree to the changes. This means that if one party to a contract does not agree to the amendment, the contract will continue to reference EONIA. However, this situation is unlikely, as most market participants are aware of the importance of transitioning to ESTR and will likely agree to the changes.

What Should Investors and Traders Do?

Market participants, including banks, asset managers, and hedge funds, must assess the impact of the EONIA to ESTR transition on their portfolios. They should identify all the financial contracts that reference EONIA and determine whether they need to be amended. They should also review the terms of their existing contracts to ensure that they are reflective of the new benchmark, ESTR.


The EONIA Bilateral Amendment Agreement is a critical step in the transition from EONIA to ESTR, ensuring that financial contracts remain reliable and compliant with the new benchmark. Market participants must take the necessary steps to prepare for the transition and ensure that their portfolios and financial contracts are up to date. By doing so, they will avoid any market disruptions and ensure that they continue to operate efficiently in the Eurozone`s financial markets.

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