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

Counterparty credit risk: CCR exposures treated with the original exposure method (OEM) (CCR 4): a value must not be negative (C34.04.01.01, Bank of England check v10486_s)

A warning on the counterparty credit risk: CCR exposures treated with the original exposure method (OEM) (CCR 4) template (C34.04.01.01), 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: CCR exposures treated with the original exposure method (OEM) (CCR 4) (C34.04.01.01): every value in 7 rows (listed below) in "Number of transactions" (column 0010), "Notional amounts" (column 0020), "Current market value (CMV), positive" (column 0030) and "Potential future exposure (PFE)" (column 0050) must be zero or more.

The headline gives only the template and the kind of check, because the rule is too long to say in a headline. The plain words above say all of it.

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 C34.04.01 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: CCR exposures treated with the original exposure method (OEM) (CCR 4) (C34.04.01.01)

Rows

  • R0010Total
  • R0020Interest rate risk
  • R0030Foreign exchange risk
  • R0040Credit risk
  • R0050Equity risk
  • R0060Commodity risk
  • R0070Of which: electricity

Columns

  • C0010Number of transactions
  • C0020Notional amounts
  • C0030Current market value (CMV), positive
  • C0050Potential future exposure (PFE)

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:

v10486_s: [C34.04.01.01 (r0010;0020;0030;0040;0050;0060;0070, c0010;0020;0030;0050)] {C34.04.01.01} >= 0
Show the formulaShow

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

{t: C34.04.01.01, r: 0010; 0020; 0030; 0040; 0050; 0060; 0070, c: 0010; 0020; 0030; 0050} >= 0

Every PRA banking rule on C34.04.01.01

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.