The European Securities and Markets Authority (ESMA) published a consultation paper on 5 May 2026 seeking input on draft guidelines for stress test scenarios under the Money Market Fund (MMF) Regulation. The guidelines aim to standardise how fund managers design and apply stress tests, covering liquidity, credit, and market risk scenarios, and are intended to enhance the resilience of the EU's €1.5 trillion MMF sector.
The consultation paper, issued by ESMA's Investment Management unit, proposes a set of mandatory stress test parameters that fund managers must apply at least quarterly. These include hypothetical shocks to short-term interest rates, credit spreads, and redemption levels, as well as combined scenarios simulating simultaneous market stress. The guidelines also require funds to assess the impact of negative interest rates and the default of a major counterparty.
Policy orientations and trade-offs
ESMA's draft guidelines reflect a push for greater harmonisation across member states, replacing the current patchwork of national approaches. The proposed scenarios are more prescriptive than existing industry practice, which some stakeholders may view as reducing flexibility. The trade-off lies between achieving consistent risk assessment across the EU and imposing additional compliance costs on fund managers, particularly smaller players. ESMA estimates the one-time implementation cost per fund at €50,000–€100,000, with ongoing annual costs of €10,000–€20,000.
Impact on stakeholders
For MMF managers, the guidelines introduce a standardised framework that may simplify cross-border compliance but require significant updates to internal risk models. Institutional investors, such as corporate treasuries and pension funds that rely on MMFs for cash management, could benefit from greater transparency and comparability of risk profiles. National competent authorities (NCAs) will gain a common benchmark for supervisory review, but may face initial resource demands to validate new stress test outputs. Consumer protection groups have broadly welcomed the move, though some argue the scenarios should be more severe to capture tail risks.
Expected institutional follow-up
The consultation is open until 5 August 2026. ESMA will then analyse responses and publish final guidelines, expected in Q1 2027, which will apply six months after publication. The guidelines are part of a broader review of the MMF Regulation, with the European Commission expected to propose legislative amendments later this year.