The amendments to the Detailed Rules of Transaction Clearing (organised trading) under Resolution No. 50/25 of the KDPW_CCP S.A. Management Board dated 8 December 2025 come into force on 22 December 2025. The amendments are made in connection with the cessation of the provision of WIBOR Tomorrow/Next (TN) and 2W by GPW Benchmark S.A. as of 22 December 2025.

The modifications concern the repo discount curve and consist in removing the TN and 2W nodes from the curve. The Detailed Rules of Transaction Clearing (organised trading) have been amended by replacing the detailed list of WIBOR nodes: ON, TN, SW, 2W, 1M, 3M, 6M, 1Y with a general reference to the repo discount curve. Discount factors are used to determine margins for repo transactions, to discount cash flows in marking-to-market calculations for repo transactions, and in calculations of repo rate margins.