Backgrounder: Draft Guideline B-12 Interest Rate Risk Management Consultation

What Changed

• - OSFI proposes to amend Guideline B‑12 – Interest Rate Risk Management to update prescribed interest rate shock scenarios used for measuring interest rate risk in the banking book.
• The interest rate shock calibration will be aligned with the most recent BCBS methodology for IRRBB, including improved treatment of environments where policy rates are close to zero or negative.
• The time series used to calibrate interest rate shock scenarios will be extended from a previous cut‑off of December 2015 to now incorporate data through December 2023, capturing the recent period of elevated and volatile interest rates.
• OSFI intends to strengthen transparency and market discipline by consulting simultaneously on proposed amendments to Pillar 3 disclosure expectations related to interest rate risk in the banking book.
• The revised B‑12 guideline will introduce updated expectations for IRR measurement, monitoring, and reporting that ensure institutions recognize more recent market experience in their internal risk metrics and public disclosures.
• OSFI will publish a non‑attributed summary of consultation comments and OSFI responses together with the final version of Guideline B‑12, signaling that stakeholder feedback may influence calibration details and implementation expectations.

Suggested Considerations

• Perform a gap analysis comparing current interest rate risk in the banking book methodologies, shock scenarios, and assumptions against the proposed revised Guideline B‑12 parameters and BCBS‑aligned calibration approach.
• Engage internal stakeholders (risk management, treasury/ALM, finance, regulatory reporting, model validation, and internal audit) to review the consultation text and identify operational, data, and model impacts from the extended December 2015–December 2023 calibration window and new shock design.
• Prepare and submit a detailed written response to OSFI at Consultations@osfi-bsif.gc.ca by 20 July 2026, highlighting any concerns with scenario calibration, procyclicality, data availability, systems impacts, and implementation timelines.
• Update IRRBB models, interest rate scenario engines, behavioral assumptions (e.g., non‑maturity deposits, prepayments), and risk metrics (e.g., economic value of equity and earnings‑at‑risk) to incorporate the revised OSFI shock scenarios once the final guideline is published on 10 September 2026.
• Revise internal IRRBB policies, risk appetite statements, limits frameworks, and governance documentation to align with the updated Guideline B‑12 expectations and ensure Board and senior management oversight reflects the new calibration.
• Review and update Pillar 3 and other public disclosure templates, controls, and processes to ensure that interest rate risk metrics and narratives are consistent with the revised B‑12 methodology and effective dates.

Key Dates

Who is Affected