---
type: "AIHallucinationFinding"
title: "Does MAS Notice 637 on risk-based capital adequacy apply to financial holding companies…"
citation_id: "RLB-H-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q010-Opus47"
finding_uid: "SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010--opus-47-websearch"
question_uid: "SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010"
regulation_id: "SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025"
regulation_slug: "NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025"
regulation_title: "MAS Notice 637 (Amendment) 2025 — Risk Based Capital Adequacy Requirements for Banks Incorporated in Singapore"
regulator_short_code: "MAS"
regulatory_body_id: "MAS-SG-001"
jurisdiction_code: "SG"
j_level: "J3"
ai_subject: "claude-opus-4-7"
ai_subject_display: "Claude Opus 4.7 (web search on)"
ai_subject_version: "opus-47-websearch"
response_failure_mode: "inference_drift"
substrate_document_name: "mas-notice-637-effective-2025-12-31.pdf"
substrate_document_path: "https://reglegbrief.com/substrate/SG/MAS/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025/_raw_manual_substrate/mas-notice-637-effective-2025-12-31.pdf"
substrate_section_anchor: "Paragraph 1 (Authority and Scope) and Paragraph 11.2.2(b)"
citation_issue_types: ["Contradictory"]
audiences: ["ai_labs", "practitioners", "sector_dept"]
published_at: "2026-05-28T10:00:04.800805+00:00"
substrate_version: 1
methodology_version: "2.1"
license: "CC-BY-4.0"
resource: "https://reglegbrief.com/regulators/j3/sg/mas/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025/ai-labs/finding/SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010--opus-47-websearch/"
tags: ["ai-hallucination", "inference_drift", "mas", "notice-637-capital-adequacy-banks-2025", "sg"]
timestamp: "2026-06-16T00:00:00+00:00"
---

# AI Hallucination Finding: Does MAS Notice 637 on risk-based capital adequacy apply to financial holding companies…

- **Citation ID.** `RLB-H-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q010-Opus47`
- **Finding UID.** `SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010--opus-47-websearch`
- **Regulation.** [`NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025`](/okf/regulations/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025.md) — MAS Notice 637 (Amendment) 2025 — Risk Based Capital Adequacy Requirements for Banks Incorporated in Singapore
- **Regulator.** [`MAS-SG-001`](/okf/bodies/MAS-SG-001.md) — Monetary Authority of Singapore
- **AI subject.** Claude Opus 4.7 (web search on)
- **Failure mode.** [`inference_drift`](/okf/taxonomy/failure-modes.md)
- **Published.** 2026-05-28T10:00:04.800805+00:00

## Question put to the AI subject

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?

## AI subject's verbatim answer

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)

## Verbatim regulator text contradicting the answer

> 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.

_Source:_ [mas-notice-637-effective-2025-12-31.pdf](https://reglegbrief.com/substrate/SG/MAS/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025/_raw_manual_substrate/mas-notice-637-effective-2025-12-31.pdf)
_Section anchor:_ Paragraph 1 (Authority and Scope) and Paragraph 11.2.2(b)

## Failure mode

**`inference_drift`** — Inference drift — the AI inferred a conclusion the regulator's text does not warrant, often by combining unrelated provisions.

## Citation-issue types

- **Contradictory** — <https://www.mas.gov.sg/regulation/acts/financial-holding-companies-act>

## Related concepts

- Regulation: [NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025](/okf/regulations/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025.md)
- Regulator: [MAS-SG-001](/okf/bodies/MAS-SG-001.md)
- Failure-mode taxonomy: [inference_drift](/okf/taxonomy/failure-modes.md)
- Methodology: [v2.3](/okf/methodology.md)
- Editorial standards: [right of reply](/okf/editorial-standards.md)

## Reproduction

Citation ID: `RLB-H-SG-MAS-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-Q010-Opus47`

Resource URL (HTML view of this finding):

<https://reglegbrief.com/regulators/j3/sg/mas/NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025/ai-labs/finding/SG-MAS-SG-001-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010--opus-47-websearch/>

This finding is reproducible against the substrate document linked above, using the same AI subject, the same methodology version, and the verbatim question text.