There has been increasing concern that the UK may withdraw from the EU without concluding a withdrawal agreement under Article 50 of the Treaty on European Union and without any transition (or implementation) period to allow market participants time to adjust.
There has been considerable discussion of the impact of this ‘no deal’ scenario on the ability of UK firms to rely on their single market passports, both to conduct new over-the-counter (OTC) derivatives business and to service legacy contracts with EU 27 clients and counterparties without authorization in the EU 27 (as well as on the obstacles to UK firms transferring legacy contracts to EU 27 affiliates). Similarly, there has been discussion of the corresponding impact of the loss of the passport on EU 27 firms conducting OTC derivatives business with UK clients and counterparties. This paper does not discuss those issues.
Instead, this paper sets out other reasons why a ‘no deal’ scenario has the potential to create a disruptive cliff-edge change in the EU regulatory requirements that apply to OTC derivatives business in a way that may adversely affect EU 27 or UK firms and their EU 27 and UK clients and counterparties.
This paper focuses on the treatment of OTC derivatives business under existing EU law. It does not consider the impact of any current legislative proposals to amend that law or whether any such amendments are likely to take effect in advance of Brexit. This paper does not address any issues arising under data protection legislation or consumer law.
The paper was developed by the International Swaps and Derivatives Association, the Association of German Banks (Bundesverband deutscher Banken), the Italian Financial Markets Intermediaries Association (Associazione Intermediari Mercati Finanziari, or ASSOSIM), the Banking and Payments Federation Ireland, the Danish Securities Dealers Association (Børsmæglerforening Danmark), the Dutch Banking Association (Nederlandse Vereniging van Banken) and the Swedish Securities Dealers Association (Svenska Fondhandlareföreningen).
Click on the attached PDF to read the full paper.
Documents (1) for Cliff Edge Effects under EU Law in a No Deal Brexit Scenario
Latest
Steps to a Vibrant Derivatives Market: SOM Remarks
Steps to a Vibrant and Resilient Derivatives Market December 4, 2025 Remarks at the Mediterranean Partnership of Securities Regulators Scott O’Malia ISDA Chief Executive Officer Good afternoon and thank you to the Mediterranean Partnership of Securities Regulators (MPSR) for...
ISDA Response to BoE on Gilt Market Resilience
On November 28, ISDA responded to the Bank of England’s discussion paper on gilt market resilience. ISDA encourages the Bank of England, before introducing any significant policy changes that would affect the functioning of the gilt repo market, to consider...
Addressing Termination Troubles
When Enron announced a shock $618 million loss on October 16, 2001, it took a further 47 days until it filed for bankruptcy. For Bear Stearns, it took 266 days between its bailout of a structured credit fund run by...
ISDA In Review – November 2025
A compendium of links to new documents, research papers, press releases and comment letters published by ISDA in November 2025.
