Xetra® T7 EMDI is one of the three interfaces that Xetra T7 uses for public market and reference data distribution via UDP multicast. This interface provides un-netted market data. The updates of the order book are delivered for all order book changes up to a given level; all on-exchange trades are reported individually.

The Xetra® T7 EMDI provide the following information to the participants:

  • Price level aggregated order book depth and trade statistics 1
  • Product and instrument states
  • Quote requests and cross requests
  • Information on newly created complex and flexible instruments (derivatives only)

Xetra®T7 EMDI publishes market data information following FIX 5.0 SP2 semantics and is a FAST 1.23 encoded interface. If any messages are lost, complete recovery is possible because every message is published on two identical services (A and B) with different multicast addresses (live-live concept). In the unlikely case that a message is lost on both services, participants can take advantage of the respective snapshot messages and rebuild the order book.

Xetra® T7 EMDI does not offer any layout-level backward compatibility feature between two releases, and within the lifetime of a release T7 reserves the right to change the behavior of some fields in the different layouts.

For further questions the Opens internal link in current windowTechnical Helpdesk is at your disposal.

Technical Helpdesk

On trading days from 8:00 to 18:00 hrs.

it_helpdesk(a)wienerboerse.at
T +43 1 531 65-170

More Information about Technical Interfaces Xetra® T7