Update cqs_standardised documentation

SuadeLabs · Dec 6, 2023 · cfee133 · cfee133
1 parent dd42971
commit cfee133
Showing 1 changed file with 16 additions and 3 deletions.
diff --git a/documentation/properties/cqs_standardised.md b/documentation/properties/cqs_standardised.md
@@ -8,8 +8,21 @@ schemas:    [entity, security]
 
 ---
 
-The credit quality step for standardised approach, measured as part of a credit quality assessment scale. Represented as a naturally positive integer number between 1 and 17 inclusive.
+The credit quality step for standardised approach, measured as part of a credit quality assessment scale by an approved [External Credit Assessment Institution](https://www.eba.europa.eu/regulation-and-policy/external-credit-assessment-institutions-ecai). Most CQS scales range from 1 to 6 however, CQS for securitisations can be more granular, ranging from 1 to 17.
 
+For example, the securitisation scale converts as follows (for S&P LT ratings):
 
-To view the Bank of England Standardised Approach click [here](http://www.bankofengland.co.uk/pra/Documents/publications/ss/2013/ss1013.pdf). To view the FCA ECAIs Standardised Approach click [here](https://www.fca.org.uk/publication/archive/fsa-ecais-standardised.pdf). To view the Committee of European Banking Supervisors' (CEBS) Standardised Approach click [here](https://www.eba.europa.eu/documents/10180/16166/4+Ausust+2006_Mapping.pdf).
-To view the European Banking Authority Standardised Approach click [here](https://www.eba.europa.eu/sites/default/documents/files/document_library/Publications/Draft%20Technical%20Standards/2022/EBA-ITS-2022-03%20ITS%20on%20the%20mapping%20of%20ECAIs%20Credit%20Assessments%20for%20securitisation%20positions/1032070/Final%20Report%20amending%20draft%20ITS%20ECAIs%20mapping%20CRR%20art%20270e.pdf).
+```bash
+1 = 1 to 4
+2 = 5 to 7
+3 = 8 to 10
+4 = 11 to 13
+5 = 14 to 16
+6 = 17
+```
+
+[EBA CQS Guidance on Standardised Approach](https://www.eba.europa.eu/regulation-and-policy/external-credit-assessment-institutions-ecai/draft-implementing-technical-standards-on-the-mapping-of-ecais-credit-assessments)
+
+[EBA CQS Guidance on Securitisation Positions](https://www.eba.europa.eu/regulation-and-policy/external-credit-assessment-institutions-ecai/its-on-the-mapping-of-ecais-credit-assessments-for-securitisation-positions)
+
+[BoE Guidance on CQS](https://www.bankofengland.co.uk/prudential-regulation/publication/2013/credit-risk-standardised-approach-ss)