Dear Cash Market participant,
While our constant effort is to keep the usual high availability rate of the Xetra T7 trading system, we want to support our trading participants to be prepared as best as possible for the rarely occurring incident cases. Therefore, we will start publishing newsflash messages on a regular basis that explain the handling of various special incident cases or provide more general incident handling information.
Today, we provide you with the information needed, in case a delay in the matching engine processing takes place.
1. Background information
Large processing delays in the T7 matching engine (caused e.g. by technical problems or unexpected extreme loads) may lead to the build-up of internally queued orders.
To avoid processing of old orders and to quickly recover from this delay situation, the affected products change to an internal “not tradeable” state. This rarely occurring kind of incident is automatically detected and for the relevant products the following actions are taken:
2. Best Practice
If an ETI trading session receives the message “Product_temporarily_not_tradeable”, submission of new orders should be avoided until the “Service Resumed” notification is received, since the new order flow will only exacerbate the solution of the delay problem and the orders will be rejected anyway.
Deletion of non-persistent orders and quotes already took place, so any clean-up can be limited to the deletion of persistent orders, if necessary.
3. Focus days in Simulation
This focus day scenario is provided to assist participants in testing the very rare event, where massive processing delays occur on a partition.
For more details, please check the following documents on our Xetra website www.xetra.com:
The latest news on the development and the implementation of T7 Xetra is available on our page
4. Further information
For further information, on our Xetra website, please have a look at the
If you have any further questions or comments please do not hesitate to contact your Key Account Manager or send an e-mail to client.services@deutsche-boerse.com.
Kind regards,
Your Client Services Team
Recipients: | All Xetra® Members and Vendors, all Xetra Central Coordinators |
Contact: | client.services@deutsche-boerse.com |
Web: | www.xetra.com |
Market Status XETR ⓘ
XETR
The market status window is an indication regarding the current technical availability of the trading system. It indicates whether news board messages regarding current technical issues of the trading system have been published or will be published shortly.
Please find further information about incident handling in the Emergency Playbook published on the webpage under Data & Tech > Information Channels > Emergency procedures. Detailed information about incident communication, market re-opening procedures and best practices for order and trade reconciliation can be found in the chapters 4.2, 4.3 and 4.5, respectively. Concrete information for the respective incident will be published during the incident via newsboard message
We strongly recommend not to take any decisions based on the indications in the market status window but to always check the production news board for comprehensive information on an incident.
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