Arxo Findings Register · Arxo Law

ARXO-2026-0394 · Reported

Basel Framework: MAR33.45 k formula

The surcharge factor k in MAR33.45 divides by the sum of SA charges of green and amber desks and is undefined when that sum is zero.

Consequence

Position: Single amber desk whose SA_i = 0 (fully offset positions) Reading a: k = 0/0 undefined Reading b: Surcharge 0 Difference: division by zero

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 MAR33 (in force 2023-01-01, published 2020-06-05)
Place
MAR33.45 k formula
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

Reproduced by execution. Quotations are verbatim from the official material; translations are ours and marked.

The capital surcharge is calculated as the difference between the aggregated standardised capital charges (SA_{G,A}) and the aggregated internal models-based capital charges ( ) multiplied by a factor k.
Normative text · Basel Framework MAR33 (in force 2023-01-01, published 2020-06-05) · MAR33.45 k formula · Published 2020-06-05 · retrieved 2026-10-31 · SHA-256 f33a3dc87d0a26846946b21e43938925ea5c15da64019e71c2fbdb63e73444b8 · copy

How to check it without Arxo's tools

  1. Open Basel Framework MAR33 (in force 2023-01-01, published 2020-06-05) and find MAR33.45 k formula. Compare the text with the quotation above. A copy is kept in this register: f33a3dc87d0a2684-MAR33@2023-01-01~2020-06-05.txt (SHA-256 f33a3dc87d0a26846946b21e43938925ea5c15da64019e71c2fbdb63e73444b8, 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-2026-0394, https://arxo.io/findings/ARXO-2026-0394/ (status as of 2026-10-31). Data: ARXO-2026-0394.json.