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Investment Banking × Finance — Singapore · published 2026-05-28 · methodology v2.1

Annex 6C content under MAS Notice 637

What the RLB Specialist Panel found

1. Annex 6C content under MAS Notice 637

  • Question (paraphrased to protect IP): What does Annex 6C of the consolidated MAS Notice 637 address?
  • Source regulation: MAS Notice 637 — Notice on Risk Based Capital Adequacy Requirements for Banks Incorporated in Singapore (NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025) (Regulator portal: https://www.mas.gov.sg)
  • What AI assistants typically say: The AI assistant described Annex 6C as setting out a prudent valuation framework, including the methodology and criteria a Reporting Bank must apply when prudently valuing fair-valued financial instruments and calculating additional valuation adjustments. The response was technically coherent and used Basel III terminology correctly.
  • What the regulator actually says: No bound regulator excerpt was available to confirm or deny this characterisation. The actual scope and content of Annex 6C in the consolidated MAS Notice 637 should be verified directly against the published MAS document.
  • Why the AI went wrong: The AI appears to have reasoned from its general knowledge of the Basel III capital adequacy framework — where prudent valuation and additional valuation adjustments are standard topics — and applied that structure to MAS Notice 637 without retrieving or citing the actual annex text. The result is a plausible-sounding answer that may not accurately reflect what the MAS document contains.
  • Cited source(s):
Impact for this audience

A Finance team relying on this AI response could incorrectly document the scope of Annex 6C within its internal prudent valuation policy, its AVA methodology note, or training materials used to onboard staff on MAS Notice 637 requirements. If the actual content of Annex 6C differs from the AI's characterisation, those internal documents would misstate the applicable regulatory framework — a finding that MAS supervisors could identify during a thematic review or model governance examination. Remediation would require the firm to re-issue affected policies, retrain relevant staff, and potentially explain to MAS how the error arose, all of which carry direct operational cost and reputational risk with the regulator.

References — raw findings (per AI model)
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Each finding has a stable Citation ID (RLB-F-… for aggregated case-study findings, RLB-H-… for raw per-model hallucinations) — like a DOI, the ID always resolves to the canonical finding even if URLs change.

Plain text 
RegLeg Specialist Panel (2026). "Annex 6C content under MAS Notice 637 — Investment Banking × Finance — Singapore." Citation ID: . RegLegBrief AI Hallucination Research, published 2026-05-28. https://reglegbrief.com/audiences/sectors/sg/investment_banking/finance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-019/
APA 7th edition 
RegLeg Specialist Panel. (2026). Annex 6C content under MAS Notice 637 [Hallucination finding ]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/audiences/sectors/sg/investment_banking/finance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-019/
Bluebook / OSCOLA (US + UK legal) 
RegLeg Specialist Panel, Annex 6C content under MAS Notice 637 [], RegLegBrief AI Hallucination Research (May 28, 2026), https://reglegbrief.com/audiences/sectors/sg/investment_banking/finance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-019/.
BibTeX 
@misc{reglegbrief_,
  author    = {RegLeg Specialist Panel},
  title     = {Annex 6C content under MAS Notice 637},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: },
  url       = {https://reglegbrief.com/audiences/sectors/sg/investment_banking/finance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-019/}
}
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