A member of
Eurex Clearing
1. Introduction
With this circular, Eurex announces the production launch of Prisma Release 15.2, which is scheduled for Monday, 24 August 2026. The simulation environment is planned to be available from 14 July 2026.
Simulation start: 14 July 2026
Production start: 24 August 2026
Learn now more about Prisma Release 15.2 on our dedicated initiative page under the following link: Prisma Release 15.2. Circulars, timeline and much more information will be available there for you.
2. Required action
We kindly ask all Clearing Members and participants to adjust their systems and internal processes to support the changes in member files as per this circular. A description of the files can be found under the following path in the Member Section of Deutsche Börse Group:
Resources > Eurex Clearing > Documentation & Files > Eurex Clearing Prisma > Release Documents > Document & Circular > Documents Release 15.2
3. Details of changes
A. Amendment of existing theoretical values for bonds file (FPTHEB)
The two columns representing shifted interest rates (FTHEN/FTHNB) are removed from the theoretical values for bonds file (FPTHEB).
This change of the existing file will become effective in simulation only by 31 July 2026.
B. Additional Theoretical Cash Rate File for Bonds and Repos (FILEINRT)
With the introduction of term‑dependent interest rates, the legacy format of the theoretical bond price file has become obsolete. A new theoretical cash‑market price file will be introduced that provides the applicable term rates by currency and by the trade’s settlement date. RAIRU and RAIRD are now derived from the new price file, conditional on currency and settlement date; previously, they were provided at the security (ISIN) level. The new file will be made available to members via the Common Report Engine (CRE) in the same way as for all other theoretical price files that are available today. The methodology for calculating Current Liquidating Margin (CLM) Cash remains unchanged and can be found under following link:
Risk-based Margining at Eurex > Risk Based Margining (brochure).
This new file will be available from start of simulation.
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, as applicable.
Further information
Recipients: | All Clearing Members, ISA Direct Clearing Members, Disclosed Direct Clients of Eurex Clearing AG and vendors | |
Target groups: | Middle + Backoffice, IT/System Administration | |
| Contact: | risk@eurex.com | |
| Web: | ||
| Authorized by: | Dmitrij Senko |