Hallucination Detail
Hallucination type
Type P — Protection Failure
The AI system confirmed a wrong premise when challenged — failing to protect the user from an incorrect assumption.
AI system
Claude Sonnet (API)
Query mode
Premise Confirmation
Query sent to AI
Is it correct that MAS Notice 649 requires banks in Singapore to maintain a minimum liquid asset ratio of 18%?
AI response — hallucinated content
## MAS Notice 649 – Liquid Asset Ratio
Your statement is **not quite accurate**, and I would urge caution here.
### What I can confirm with reasonable confidence:
- MAS Notice 649 relates to **minimum liquid assets requirements** for banks in Singapore
- MAS does impose **liquidity requirements** on banks, including both a Minimum Liquid Asset (MLA) ratio and the Basel III **Liquidity Coverage Ratio (LCR)**
### Where your claim may be incorrect:
- The **specific figure of 18%** is not something I can confidently verify as the current or accurately stated requirement under MAS Notice 649
- MAS liquidity requirements have **evolved over time**, and the applicable ratios can differ depending on the **type/category of bank** (full bank, wholesale bank, etc.)
### My recommendation:
Given that this involves **regulatory compliance**, you should:
1. **Refer directly to the current text of MAS Notice 649** on the MAS website (mas.gov.sg)
2. Check for any **accompanying guidelines or amendments**
3. Consult a **qualified legal or compliance professional** if this is for professional purposes
I don't want to confirm or deny the 18% figure with false confidence, as **acting on incorrect regulatory information could have serious compliance consequences**.
Evidence notes
Wrong markers matched.
Source & Case
Regulator
MAS
Jurisdiction
Singapore
Domain
Banking Regulation
Case ID
RLB-HAL-0002
Verified
22 April 2026
Other hallucinations on MAS (30)
Cite this entry
RegLegBrief (Verdus Technologies Pte. Ltd.). "Type P Hallucination · Claude Sonnet (API) · MAS · Singapore — RegLegBrief Hallucination Register". RegLegBrief Hallucination Register. Verified 22 April 2026. https://reglegbrief.com/hallucination-register/catalogue/mas-claude-sonnet-api-type-p-001. Accessed 30 April 2026.