Estonia adopts EBA stressed-VaR 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 stressed value-at-riskFI. Finantsinspektsioon has issued the EBA Guidelines on Stressed Value At Risk (EBA/GL/2012/2, London, 16 May 2012)FI 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 the market-risk capital requirement in the trading bookFI, at the solo or consolidated level where the model is authorisedFI. They complement the CRD III stressed-VaR provisions (Directive 2010/76/EU, transposing the Basel January 2009 proposal to add a stressed-VaR charge alongside VaR and the incremental risk charge) with practical guidance in four chapters. The stressed-VaR add-on answers the crisis lesson that trading-book losses far exceeded Pillar 1 minimums: a one-year observation period of significant losses dampens the pro-cyclicality of VaR-based capital.

The most material modelling choice — the approach used to identify the stressed period — is subject to competent-authority approvalFI. Calibration must rest on historical inputs from a continuous 12-month period of significant financial stress relevant to the institution's portfolioFI, and the 12-month rule holds even where the institution identifies a shorter but significant stress eventFI. A single group-level stressed period suffices where approved on a consolidated basisFI. Further guidance covers the review frequency and monitoring of the stressed period, consistency between the VaR and stressed-VaR methodologies, the use and validation of proxies (with separate defined terms for antithetic data and de-meaning), and use-test requirements. 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 centres on the stressed-period file: any desk running an authorised IMA for market risk must be able to evidence a competent-authority-approved 12-month stress window relevant to its own portfolio, a documented identification approach, review and monitoring routines, and proxy validationFI — because the Finantsinspektsioon issuance makes the 2012 EBA text the domestic supervisory yardstick from 6 October 2026. Together with the parallel IRC issuance, both 2012 trading-book guideline packages now stand as Estonian supervisory expectation. The legal basis is EBA/GL/2012/2 under Article 16 of Regulation (EU) No 1093/2010FI, issued domestically as a Finantsinspektsiooni soovituslik juhend.