Estonia adopts EBA default-migration risk rules for trading books

Estonian credit institutions and investment firms that use internal models for trading-book market risk face a new comply-or-explain supervisory expectation on the incremental default and migration risk chargeFI. Finantsinspektsioon has issued the EBA Guidelines on the Incremental Default and Migration Risk ChargeFI (EBA/GL/2012/3, London, 16 May 2012) as a Finantsinspektsiooni soovituslik juhend; the Finantsinspektsioon guideline page states an effective date of 6 October 2026FI. Under Article 16(3) of the EBA founding regulation, competent authorities and financial market participants must make every effort to comply with EBA guidelinesFI.

The guidelines apply to institutions using an Internal Model Approach for calculating capital requirements for specific interest risk in the trading book, at the solo or consolidated level where the model is authorisedFI. They complement the CRD III incremental-risk provisions (Directive 2010/76/EU, transposed from the Basel incremental-risk framework) with practical guidance across thirteen chapters: scope of application and permanent partial use, individual modelling parameters and ratings, interdependence of default and migration events, migration matrices, the constant-level-of-risk assumption over the one-year capital horizon with liquidity horizons and rebalancing, hedging and diversification effects, P&L valuation, validation, use tests, documentation, non-fully-compliant approaches, and calculation frequency.

The IRC calculation must include all long and short positions subject to a modelled specific-interest-rate-risk charge. Covered expressly are sovereign bonds even where the standardised approach would give a zero charge, structured bonds and credit-linked notes without securitisation or nth-to-default exposure, money-market loans, look-through CIU positions that would qualify directly, covered bonds such as Pfandbriefe, non-tranched pass-through asset-backed securities, and material defaulted-debt positions (which may leave the migration element where default is modelled as an absorbing state, though uncertain recovery-mark risk must still be capitalised). Excluded are securitisations. Competent authorities were to embed the guidelines in supervisory procedures within six months of the 2012 publication and thereafter ensure effective compliance by institutions.

For Estonian market-risk quants, validators and supervisors the practical consequence turns on scope: any desk running an authorised IMA for specific interest risk must evidence that its IRC model follows the thirteen-chapter guidance — position coverage, migration matrices, liquidity horizons, validation and documentationFI — because the Finantsinspektsioon issuance makes the 2012 EBA text the domestic supervisory yardstick from 6 October 2026FI. The legal basis is EBA/GL/2012/3 under Article 16 of Regulation (EU) No 1093/2010FI, issued domestically as a Finantsinspektsiooni soovituslik juhend.