Scope of Mock Trading Session on July 26th, 2025 - PUMA Trading System

To assist participants in planning changes and implementations, a mock trading session of the PUMA Trading System will be held on July 26th, 2025, with market participation. In this session, the following system and infrastructure changes will be validated:

For the validation of Order Book Management based on Price/Priority in the Binary Market Data, we will temporarily disable the position tag for channels 94 (Equities) and 72 (Derivatives) exclusively during this mock test. Consequently, the management of the order book in these channels will be prioritized.

We would like to emphasize that the system will revert to normal at the conclusion of the simulation test, with the position publication being reinstated. The final deactivation of position publication in production is scheduled for August.

tests can be conducted during the requested testing sessions via the service flow, as well as during the current production sessions for specific gateways as detailed below:

Binary:10001,10002,20001,20002
FIX: OE001 to OE008 and OE121 to OE128.

These connections will function on both the new and current networks.

Additionally, for the testing of the new network, we will utilize assets with Market Segment IDs 82 and 78. Clients will be able to trade these assets on both the new and old networks. Should clients wish to test other assets on the new network, submissions will be permitted; however, it is important to note that market data will only be displayed for the assets, with no quotes available for others.

Finally, we would like to inform you that the validation for the listed test assets below has been available since July 15, 2025, allowing for connectivity validation throughout the week.

1. Mock trading session timetable
2. Morning test of the electronic trading system

It is mandatory for all the firms to participate in the morning test, which will be held on July 28^th, 2025 (Monday), from 7:00 a.m. to 7:45 a.m. for the derivatives market and from 7:00 a.m. to 8:00 a.m. for the equities market in both production environments.

3. Participation confirmation:

The activities to be performed during the test can be found in the mandatory script. Market data for these instruments will be sent during the mock trading session.

Participation in the mock trading session must be confirmed no later than 12 noon on July 26th, 2025 (Friday), exclusively by email at [email protected] with “Mock trading session” in the subject line, identifying the institution, naming the individuals who will participate and supplying their contact details (telephone numbers and email addresses).

In response to this confirmation, the participant will receive the mandatory test script and must fill it out and send it to the above email address.

Please note that mock trading session participants must adjust their internal systems so that the results of the mock trading session are completely segregated from real trading sessions.

Further information can be obtained from B3 Services – Trading, by telephone on +55 11 2565-5021/5022.