Arxo Findings Register · Arxo Law

ARXO-2026-0385 · Reported

Basel Framework: MAR21.33 and MAR21.38(2) bucket references

MAR21.33 and MAR21.38 cite MAR21.53 (the CSR risk-weight table) for bucket definitions, which are in MAR21.51.

Consequence

Position: CSR index sensitivity, 80% IG sovereigns Reading a: bucket definitions in MAR21.53 Table 4: only bucket numbers and weights, no sector/credit quality definition to test '75% mapped to a sector bucket' Reading b: bucket definitions in MAR21.51 Table 3: bucket 1 IG sovereigns, RW 0.5% Difference: reference does not lead to the criterion

Proposed correction

Clarify or correct the cited passage so that the rule and its references give one result for the stated case.

Issued by
Basel Committee on Banking Supervision
Act
Basel Framework MAR21 (in force 2023-01-01, published 2026-03-23)
Place
MAR21.33 and MAR21.38(2) bucket references
Record
Discrepancy
Class
Text of the act
Where it arose
The text of the act
Arxo's conclusion
Confirmed
Official text
Unchanged at last check
Last checked
2026-10-31

Evidence

Contradiction within the text. Quotations are verbatim from the official material; translations are ours and marked.

The sensitivity to the index should be assigned to the relevant delta risk bucket defined in MAR21.53 and MAR21.72 as follows:
Normative text · Basel Framework MAR21 (in force 2023-01-01, published 2026-03-23) · MAR21.33 and MAR21.38(2) bucket references · Published 2026-03-23 · retrieved 2026-10-31 · SHA-256 702d93bcc11364c3ffc2c0c81eb0c5981d89544031c7ebc2a84605f86b22df28 · copy
For delta CSR non-securitisations, buckets are set along two dimensions - credit quality and sector - as set out in Table 3.
Normative text · Basel Framework MAR21 (in force 2023-01-01, published 2026-03-23) · MAR21.33 and MAR21.38(2) bucket references · Published 2026-03-23 · retrieved 2026-10-31 · SHA-256 702d93bcc11364c3ffc2c0c81eb0c5981d89544031c7ebc2a84605f86b22df28 · copy

How to check it without Arxo's tools

  1. Open Basel Framework MAR21 (in force 2023-01-01, published 2026-03-23) and find MAR21.33 and MAR21.38(2) bucket references. Compare the text with the quotation above. A copy is kept in this register: 702d93bcc11364c3-MAR21@2023-01-01~2026-03-23.txt (SHA-256 702d93bcc11364c3ffc2c0c81eb0c5981d89544031c7ebc2a84605f86b22df28, copy of the official file).
  2. The finding holds if the quoted passages read as shown and the comparison gives the result stated at the top of this page. If it does not, write to us with the record ID.

How this finding was made

AI models read the texts, built the examples and reviewed the findings.

Responsible institutions

Reported to

DateInstitutionChannelReference
2026-10-31Basel Committee on Banking Supervisione-mailhttps://mail.google.com/mail/u/0/#sent/KtbxLthRTjRNkqRtWGvxMWmXhVdckfWkGV

Responses

No response recorded.

History

  1. 2026-10-31Confirmed by Arxo
  2. 2026-10-31Entered in the register
  3. 2026-10-31Reported to Basel Committee on Banking Supervision (e-mail)

Cite this record

Arxo Law, Arxo Findings Register, ARXO-2026-0385, https://arxo.io/findings/ARXO-2026-0385/ (status as of 2026-10-31). Data: ARXO-2026-0385.json.