The AMF complies with ESMA’s guidelines on updating the stress scenario parameters provided for in Article 28 of the Money Market Funds Regulation for 2026

Stress simulation reporting 

In accordance with Article 28 of Regulation (EU) 2017/1131 on money market funds (MMF Regulation), the manager of a money market fund is required to assess the impact of stress testing scenarios on the fund. Under Article 37 of the MMF Regulation, the results of stress testing for a money market fund are sent to its competent authority in a quarterly report if the fund's assets exceed 100 million euros. Other money market funds must report annually. The competent authority then forwards this report to ESMA.

Clarification of the latest ESMA guidelines

The ESMA guidelines published in 2019 (ESMA34-49-172) set out the common reference parameters for the different stress scenarios. In accordance with Article 28(7) of the Money Market Funds Regulation, these guidelines are updated at least once a year to take account of the latest market developments. 

Against this backdrop, on 26 March 2026, ESMA published the official translations of its new guidelines on updating stress testing parameters (ESMA50-481369926-30848). These parameter updates reflect the market conditions prevailing at the time of their calibration at the end of 2025.

This is the sixth reassessment of the parameters to be taken into account for stress test simulation exercises since the Money Market Fund Regulation (MMFR) came into force in 2020. In particular, it provides methodological clarifications on macro-systemic shock scenarios.

Asset management companies must include both market shock and the liquidity impact on the assets held when evaluating this stress test, but must not simulate an increase in redemptions from the money market fund.

Operational application

Under the ‘apply or explain’ procedure, these guidelines become applicable within two months of this date, i.e. 26 May 2026. As money market fund reporting is communicated on a quarterly basis for money market funds with assets in excess of 100 million euros, money market fund managers must use the updated stress scenario parameters from 30 June 2026.

The AMF draws fund managers' attention to the importance of updating these parameters for their submissions due from 30 June 2026. Market participants who have anticipated the parameter update for submissions due before this date must correct these and resubmit them using the old parameters.