1 min readWarningBank of England banking taxonomy 4.1.1Updated 11 November 2026

Counterparty credit risk: top twenty counterparties (CCR 6): every value in 6 columns must be zero or more (C34.06.01.01, Bank of England check v10488_s)

A warning on the counterparty credit risk: top twenty counterparties (CCR 6) template (C34.06.01.01), in the own funds (PRA001) return.

Line4 Check runs it on the own funds (PRA001) return, proven on test files, check by check: the same outcome on all three test files of that return.

The rule in plain words

In Counterparty credit risk: top twenty counterparties (CCR 6) (C34.06.01.01): every value in 6 columns (listed below) must be zero or more.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Look for a value below zero in these cells, such as an amount entered as a negative number.
  3. 03It runs only when your filing indicators mark C34.06.01 as reported.
  4. 04This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

Counterparty credit risk: top twenty counterparties (CCR 6) (C34.06.01.01)

Columns

  • C0070Number of transactions
  • C0080Notional amounts
  • C0100Current market value (CMV), negative
  • C0110Exposure value post-CRM
  • C0120Exposure value
  • C0130Risk weighted exposure amounts

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds (PRA001) returns, as a warning.

The Bank’s own words and formula

The plain words above spell out the Bank’s formula, with each cell named from its templates. In the Bank of England’s list of validations, word for word:

v10488_s: [C34.06.01.01 (All rows, c0070;0080;0100;0110;0120;0130)] {C34.06.01.01} >= 0
Show the formulaShow

The Bank of England's formula. Cells are written as {t: table, r: row, c: column}.

{t: C34.06.01.01, c: 0070; 0080; 0100; 0110; 0120; 0130} >= 0

Checks like this one, run at the point of submission, are the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.