Dear Market Participants,

We would like to inform you about upcoming updates in short-term electricity markets in the Czech Republic.

In the OTE continuous intraday market, which is organized as part of the European Single Intraday Coupling (SIDC),  there will be, in relation to the deployment of the new R5.0 version of the central SIDC system (XBID) on 11 June 2026, an increase in market depth visibility from a maximum of 50 orders to a maximum of 100 orders.

The new version of the XBID system further improves system performance, security, and stability. Discussions on corrective measures necessary for maintaining the performance of the central system are still ongoing at the pan-European level. These measures can be implemented if the performance of the XBID system is significantly affected. Further information can be found on the NEMO Committee website.

We are also enhancing the security of day-ahead market (DA), continuous intraday market (ID), and intraday auctions (IDA) in the Czech Republic by expanding the functionality of user bid limits. From 24 June 2026, the following changes will be introduced:

·         For DA, ID and IDA, it will be possible to apply user limits to orders placed via automated communication. Orders exceeding these limits will be rejected.

·         For DA and IDA, it will be possible to apply user limits to orders placed via the CS OTE trading portal user interface. If a limit is exceeded, order processing will be suspended without the option to continue. This will help improve the current notification mechanism, which allows users to respond to a system prompt and proceed with order entry.

These new features complement the existing user (trading) limits and further enhance the trading experience in short-term markets. A detailed description of the new features will be published in the user manual on 15 June 2026.