Eurex Clearing Readiness Newsflash | C7 SCS Release 5.5: Publication of Member documentation and action items regarding UNO Wave 2

With this Newsflash, Eurex Clearing wants to draw your attention to the publication of documentation in the context of C7 SCS Release 5.5 and to three action items regarding Clearstream's UNO Project Wave 2.

Member documentation for C7 SCS Release 5.5

The following C7 SCS Release 5.5 documents are now available on the Eurex Clearing website www.eurex.com/ec-en/ under the following link:

C7 SCS Release 5.5 > Overview and Functionality: 

• C7 SCS 5.5 – Release Notes
• C7 SCS 5.5 – Member Communication Calendar

Moreover, under Reports, the following additional documents have been published:

• Eurex Clearing – C7 SCS XML Reports – Reference Manual
• Eurex Clearing – C7 SCS XML Reports – Modification Notes
• Eurex Clearing – C7 SCS XML Reports – XML Schema Files

On the same dedicated initiative page for C7 SCS Release 5.5, circulars, timeline and much more information is available for you.

UNO Project Wave 2

Additionally, Eurex Clearing would like to bring to your attention three action items related to Clearstream’s project UNO Wave 2 that are fundamental in C7 SCS Release 5.5:

a) Testing possibility for Market Activation Wave 2

Clearstream will change its T2S link setup for the Swiss US/Canada markets which will result in cancellation of pending deliveries and reinstruction to the 6-series account. To test this market activation wave, Clearing Members will have a chance to participate in testing activities on 29 April 2026. More details are available in the Member Simulation Guide.

b) German ADRs handling 

On 18 May 2026, Clearstream will update the custody type of German ADRs from CSC to NCSC. The only impacted ISIN cleared by Eurex Clearing is BioNTech SE (ISIN US09075V1026). Cancellation of pending deliveries and reinstruction to the 6-series account will take place during the migration. More details are available in section 3.6 of the Release Notes and on Unified for New Opportunities: Wave 2 market activation for German ADRs.

c) CHF funding of 6-series accounts

After 1 June 2026 and the replacement of the direct link between Clearstream Europe AG (CEU) and SIX SIS, Clearstream will book CHF payments to the 6-series cash account mapped to the CEU account. Clearing Members and Settlement Institutions are requested to ensure that cash and/or credit lines on this account are sufficient to settle their CHF transactions. This is particularly important when settling bond deliveries resulting from notification/allocation of Fixed Income Futures on Swiss government bonds (CONF) on a CEU account. First such delivery date is Wednesday, 10 June 2026. More details are available in section 3.3 of the Release Notes.

If you have any further questions, please send an e-mail to uno.ecag@eurex.com.

Kind regards, 
Your Client Services Team

Further information