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Regulation 65 Internal approaches for calculating own funds requirements
(1) The Bank may require institutions that are designated as significant, under Regulation 64(5), to develop internal credit risk assessment capacity and increase use of the internal ratings based approach for calculating own funds requirements for credit risk, where their exposures are material in absolute terms and where they have at the same time a large number of material counterparties.
(2) Paragraph (1) is without prejudice to the fulfilment of criteria laid down in Part Three, Title I, Chapter 3, Section 1 of the Capital Requirements Regulation.
(3) The Bank shall, taking into account the nature, scale and complexity of the activities of institutions, monitor that those institutions do not solely or mechanistically rely on external credit ratings for assessing the creditworthiness of an entity or financial instrument.
(4) The Bank may require institutions to -
(a) develop an internal specific risk assessment capacity,
(b) develop or increase their use of internal models for calculating own funds requirements for specific risk of debt instruments in the trading book, and