MAS Notice 649 is a regulatory framework issued by the Monetary Authority of Singapore (MAS) that sets out the capital requirements for banks incorporated in Singapore. It includes guidelines on the minimum capital adequacy ratios that banks must maintain. The specific thresholds you are referring to, 16% and 18%, likely pertain to the capital adequacy ratios under the Notice. These ratios are critical for ensuring that banks have enough capital to cover their risks and continue operations during financial stress. If there was a discrepancy where an AI or another source stated a 16% threshold when the correct figure is 18%, it could be due to a few reasons: 1. **Updates or Amendments**: Regulatory frameworks like MAS Notice 649 can be updated or amended over time. It's possible that the threshold was previously 16% and was later updated to 18%. 2. **Different Requirements for Different Banks**: Sometimes, different thresholds apply to different categories of banks or under different circumstances. For example, systemically important banks might have higher capital requirements. 3. **Interpretation Errors**: Misinterpretation of the guidelines or errors in communication can lead to incorrect figures being cited. To resolve such discrepancies, it's important to refer to the latest official documents from the MAS or consult with a regulatory expert. If you have access to the specific version of MAS Notice 649 in question, reviewing the document directly would provide the most accurate information.