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Eurex Clearing
1. Introduction
The Stress Period Value-at-Risk (VaR) is an integral part of the market-risk initial-margin of Eurex Clearing’s Prisma methodology. To mitigate potential pro-cyclical behavior of initial margins, the stress period VaR serves as a prudent margin floor primarily relevant during low volatility market regimes. Model parameters comprise the selection of historical stress period dates for the risk scenarios and the quantile level on which the margin floor is evaluated, and which is calibrated to match a long-term target VaR.
As part of regular annual review, Eurex Clearing recalibrated the stress period parameters used in the Prisma model for margining of Exchange Traded Derivatives (ETD) and Over-The-Counter Derivatives (OTC).
Effective 29 June 2026 for all liquidation groups, the annual recalibration will affect the following model parameters (see both tables under 3):
The recalibrated parameters are included in this circular and will be incorporated in the transparency enabler files on the effective date.
Production start: 29 June 2026
2. Required action
There are no required actions or infrastructure changes for participants. The margin model parameter revision will be automatically reflected in the required initial margin amounts at the start of business on the production start date. All model parameters are distributed in the usual manner as part of the current Member reporting (reports CC221, CC202).
3. Details of the initiative
Please refer to the tables below which summarize the relevant Stress Period VaR parameters for all the liquidation groups.
Liquidation Group | LG split | Risk horizon | Simulation type | Number of scenarios | Stress Period VaR quantile parameter |
PEQ01 | 3 days | Stress (floor) | 252 | 91.86% | |
PFI01 | PFI01_HP2 | 2 days | Stress (floor) | 250 | 95.92% |
PFI01_HP5 | 5 days | Stress (floor) | 250 | IRS: 97.60% XM: 97.79%1 | |
PNF01 | 5 days | Stress (floor) | 250 | 95.8% | |
PCM01 | 3 days | Stress (floor) | 252 | 94.12% | |
PPM01 | 3 days | Stress (floor) | 252 | 92.48% | |
PFX01 | 2 days | Stress (floor) | 250 | 95.92% | |
PEF01 | 2 days | Stress (floor) | 250 | 90.30% | |
PCY01 | PCY01_HP3 (Bitcoin) | 3 days | Stress (floor) | 252 | 93.92% |
PCY01_HP3_ETH (Ether) | 3 days | Stress (floor) | 252 | 94.67% |
Liquidation Group | Historical stress period dates |
PEQ01 | 02/10/2008-26/02/2009, 02/03/2009-06/04/2009, 06/02/2018-26/02/2018, 28/02/2020-28/05/2020, 07/04/2025-04/06/2025 |
PFI01 (PFI01_HP2, 2 days) | 16/09/2008-13/10/2008, 29/10/2008-05/11/2008, 06/01/2009-21/01/2009, 03/02/2009-04/02/2009, 08/08/2011-19/08/2011, 10/11/2011-25/11/2011, 02/12/2011-04/01/2012, 15/02/2012-06/03/2012, 28/08/2014-29/09/2014, 15/01/2015-16/01/2015, 27/03/2020-30/03/2020, 27/06/2022-09/08/2022, 04/10/2022-19/10/2022, 21/10/2022-29/12/2022, 27/01/2023-16/02/2023, 15/03/2023-04/04/2023 |
PFI01 (PFI01_HP5, 5 days, OTC IRS) | 26/03/2008-03/04/2008, 23/04/2008-14/05/2008, 20/11/2008-09/02/2009, 24/04/2009-14/05/2009, 10/06/2009-25/06/2009, 19/12/2011-14/03/2012, 20/09/2022-08/12/2022, 17/03/2023-27/03/2023, 25/02/2026-24/03/2026 |
PNF01 (OTC NDFs) | 30/09/2008-26/02/2009, 20/03/2009-25/03/2009, 04/09/2013-24/09/2013, 13/07/2022-16/08/2022, 19/08/2022-08/09/2022, 16/11/2022-17/11/2022, 29/04/2025-25/08/2025 |
PCM01 | 02/10/2008-28/05/2009, 06/03/2020-08/06/2020, 09/03/2022-08/04/2022 |
PPM01 | 12/09/2008-07/05/2009, 06/09/2011-20/09/2011, 17/03/2020-30/04/2020, 29/01/2026-02/04/2026 |
PFX01 | 16/09/2008-13/10/2008, 29/10/2008-05/11/2008, 06/01/2009-21/01/2009, 03/02/2009-04/02/2009, 08/08/2011-19/08/2011, 10/11/2011-25/11/2011, 02/12/2011-04/01/2012, 15/02/2012-06/03/2012, 28/08/2014-29/09/2014, 15/01/2015-16/01/2015, 27/03/2020-30/03/2020, 27/06/2022-09/08/2022, 04/10/2022-19/10/2022, 21/10/2022-29/12/2022, 27/01/2023-16/02/2023, 15/03/2023-04/04/2023 |
PEF01 | 16/09/2008-27/04/2009, 05/03/2020-08/07/2020, 11/11/2022-22/11/2022 |
PCY01 (PCY01_HP3, Bitcoin) | 03/04/2013-14/08/2013, 14/11/2013-25/03/2014, 08/01/2018-05/03/2018, 28/06/2019-09/07/2019, 16/03/2020-07/04/2020 |
PCY01 (PCY01_HP3_ETH, Ether) | 10/04/2013-20/06/2013, 22/10/2015-24/11/2015, 19/01/2016-12/05/2016, 10/06/2016-12/07/2016, 26/07/2016-15/08/2016, 02/06/2017-01/08/2017, 17/03/2022-06/04/2022 |
Unless the context requires otherwise, terms used and not otherwise defined in this circular shall have the meaning ascribed to them in the Clearing Conditions or FCM Clearing Conditions of Eurex Clearing AG, as applicable.
Further information
Recipients: | All Clearing Members, Basic Clearing Members, Disclosed Direct Clients of Eurex Clearing AG and vendors, all FCM Clearing Members and other affected contractual parties |
Target groups: | Front Office/Trading, Middle + Backoffice, IT/System Administration |
| Contact: | Your Clearing Key Account Manager |
| Web: | www.eurex.com/ec-en/ |
| Authorized by: | Dmitrij Senko |