The Underlying Issuer type is a mandatory field required for the generation of a valid CFI code. The current 2015 ISO 10962 CFI taxonomy contains three values – Corporate, Sovereign & Local. For instruments with Index underlier, this field is defaulted to ‘Corporate’ however is eligible for user amendment where required.

This attribute has been included in all Credit definitions to align with CPMI-IOSCO UPI list of attributes. Where this field is not relevant such as for Index & Index Tranche the DSB accepts a value of “n/a” in place of the usual enumeration list.

This field has a different interpretation depending on the asset class. For Rates particularly, the CFI working group assigned P – physical for all instruments other than non-deliverable indicating that the cashflows are physically delivered. Cash was reserved for non-deliverable instruments. In any case, the attribute is optional and can be changed by the user […]

To ensure the OTC ISIN can be created, validated and returned to users near real time, the only validation the DSB performs on the underlying ISIN is syntactic validation. The onus is on the user to ensure the correct underlier is submitted for the correct template. You should note that not all DSB ISINs that […]