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MAS Notice 637 (Amendment) 2025, Risk Based Capital Adequacy Requirements for Banks Incorporated in Singapore

Monetary Authority of Singapore (MAS) · published 2025-10-09

Last updated 28 May 2026 · Full ledger: Hallucination Register · Parent: MAS

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Findings live
1
AI subjects
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Citation issues
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Dominant mode count
Research Pending Awaiting research outcome
Hallucination Shape
(2 Response Hallucination + 1 Citation Hallucination = 3 Hallucination findings)

Response Hallucination Modes (2 failures)

Misstated Rule 0 Outdated 0 Misattributed 0 Inference Drift 2

Citation Hallucination Modes (1 failure)

Fabricated 0
Pretextual 0
Contradictory 1
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Hallucination findings

2 finding cards across 1 AI Model — covering 2 Response Hallucinations + 1 Citation Hallucination (3 hallucination failures total). Each card pairs the AI's answer against the authenticated regulator-text excerpt that contradicts it, and flags every AI-cited source as Fabricated / Pretextual / Contradictory.

Model: Claude Opus 4.7 (web search on) · published 2026-05-28 · Inference Drift
RLB-H-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q010-Opus47
Does MAS Notice 637 on risk-based capital adequacy apply to financial holding companies incorporated in Singapore, or is there a separate MAS notice for them, and if so, what is it?
Claude Opus 4.7 (web search on) answered
Financial holding companies incorporated in Singapore are covered by a separate notice issued under the Financial Holding Companies Act — typically Notice FHC-N637 (Risk Based Capital Adequacy Requirements for Financial Holding Companies)
Regulator text says
This Notice is issued pursuant to section 55(1) and section 65(2) of the Banking Act and applies to all Reporting Banks. [...] 11.2.2 A Reporting Bank need not comply with the requirements in this Part if it is a subsidiary of (a) another Reporting Bank which is subject to the requirements in this Part; or (b) a financial holding company which is subject to requirements similar to that set out in this Part.
Verbatim source
mas-notice-637-effective-2025-12-31.pdf — Paragraph 1 (Authority and Scope) and Paragraph 11.2.2(b)
substrate/SG/MAS/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025/_raw_manual_substrate/mas-notice-637-effective-2025-12-31.pdf
AI's cited sources
Model: Claude Opus 4.7 (web search on) · published 2026-05-28 · Inference Drift
RLB-H-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q012-Opus47
In MAS Notice 637 (Amendment) 2024, what do the yellow-highlighted passages signify, and will they appear in the final consolidated version of the Notice?
Claude Opus 4.7 (web search on) answered
Yellow highlighting in MAS tracked-change amendment PDFs is typically used as a drafting/visual aid to draw attention to particular text — for example, defined terms, cross-references, or items the reader should pay particular attention to during review.
Regulator text says
Text which is highlighted in yellow are annotations to describe changes, and will not appear in the published untracked version of MAS Notice 637. For instance, where amendments have been made to a selected paragraph of an Annex, only that paragraph will be reflected in this document, prefaced with the following explanatory text in yellow highlights: [Amendments to paragraph xx].
Verbatim source
mas-notice-637-amendment-2025.pdf — MAS Notice 637 (Amendment) 2025, Paragraph 3(c)
substrate/SG/MAS/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025/_raw_manual_substrate/mas-notice-637-amendment-2025.pdf
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Every finding on this page compares an AI subject's account of the rule against the regulator's verbatim text from the regulator's own portal. Both are linked. Each delta, its root causes, and impact analysis are documented and published with immutable Citation IDs.