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The ISDA 2021 EONIA Collateral Agreement Fallbacks Protocol

The European Overnight Index, or EONIA, is due to permanently cease to be published from 3 January 2022, as EONIA does not meet the requirements for a financial “benchmark” under the European Benchmark Regulation1. 

In a sense, EONIA has already ceased, as since October 2019 EONIA has not been independently determined but instead has been published as a rate equal to the Euro Short-Term Rate (€STR), plus 8.5 basis points. 

EONIA is a particularly important rate for the OTC derivatives market, as this is the interest rate most commonly applied when euro cash collateral passes under an ISDA Credit Support Annex (CSA). The significance of EONIA disappearing is more than simply that the interest rate to be paid under an affected CSA will cease to exist and so needs to be replaced. It is also that the CSA interest rate is the rate by which cash flows on the derivatives that are subject to it should be discounted when valuing them.  

The European Union has consulted on a partial legislative fix to deal with the disappearance of EONIA, but this only applies to contracts where the governing law is that of a country in the European Economic Area (EEA) or both parties to the contract are based in the EEA and the law of the contract is that of a third country that does not provide for an orderly wind-down of the benchmark.

In the absence of a general legislative fix, the market-led remedy for the discontinuance of EONIA for the many CSAs that are governed by English law or New York law is the ISDA 2021 EONIA Collateral Agreement Fallbacks Protocol (the Protocol). If both parties to a CSA that refers to EONIA adhere to the Protocol, then the CSA would be deemed amended to:

  1. incorporate the new ISDA Collateral Agreement Interest Rate Definitions v 2.0 (the Collateral Definitions); and
  2. change references from EONIA to “EONIA (Collateral Rate)”, a defined term in the Collateral Definitions that provides a fallback to €STR+8.5 basis points when EONIA ceases to be published.

This allows for widespread addressing of EONIA cessation in CSAs without the need for individual bilateral negotiation and provides for a more robust fallback for purposes of complying with applicable benchmark regulation.

Since publication of the Protocol last month there have been relatively few adherents compared to some past ISDA protocols with market-wide impact. Despite this, we expect that the number of adherents will increase significantly over the coming months.

In addition, ISDA has published two bilateral amendment templates that parties can use to update EONIA references in a broader range of derivatives documents, including transaction confirmations, collateral documents and master agreements. A broader range of amendment options is also provided, including fallbacks to €STR flat as well as €STR plus 8.5 basis points.

EONIA or €STR, what is the difference?

  • EONIA was a measure of overnight interbank borrowing costs, typically based on estimates. Prior to October 2019 EONIA was based on submissions from 28 European banks for the cost of borrowing interbank. EONIA reflected the offer rate, meaning what banks reported that they would have to pay to borrow if they approached another bank to do so.
  • €STR is a measure of overnight wholesale market borrowing costs that has been published since October 2019. €STR is based on transaction data of 52 banks when entering into transactions with financial counterparties (rather than just other banks).

Rates tend to be lower in the wholesale market, such that a spread averaging 8.5 basis points was observed prior to October 2019 between EONIA and a calculation of €STR. This observed spread then became the fixed spread over €STR for published EONIA.


1 Regulation (EU) 2016/1011

The EONIA Collateral Protocol offers market participants an efficient way to amend the terms of certain ISDA collateral agreements to incorporate a fallback to €STR plus 8.5 basis points upon the cessation of EONIA.

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derivatives and trading, alternative afm, banks and alt lenders, institutional asset managers, private companies, hedge funds

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