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

The sum of "Long derivative positions" and "Short derivative positions" must equal "Total" (C34.01.01.01, Bank of England check v09801_m)

A warning on the counterparty credit risk: size of the derivative business (CCR 1) template (C34.01.01.01), 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.

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The rule in plain words

In each of "Size of the derivative business" (row 0010), "On- and off-balance sheet derivatives" (row 0020) and "(-) Credit derivatives that are recognised as internal hedges against non-trading book credit risk exposures" (row 0030) of Counterparty credit risk: size of the derivative business (CCR 1) (C34.01.01.01): the sum of "Long derivative positions" (column 0010) and "Short derivative positions" (column 0020) must equal "Total" (column 0030).

This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it. It runs only when your filing indicators mark C34.01.01 as reported.

The cells it reads

Counterparty credit risk: size of the derivative business (CCR 1) (C34.01.01.01)

Rows

  • R0010Size of the derivative business
  • R0020On- and off-balance sheet derivatives
  • R0030(-) Credit derivatives that are recognised as internal hedges against non-trading book credit risk exposures

Columns

  • C0010Long derivative positions
  • C0020Short derivative positions
  • C0030Total

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:

[v09801_m];[scope({t: C34.01.01.01, r:0010;0020;0030})];[{t: C34.01.01.01, c: 0010} + {t: C34.01.01.01, c: 0020} = {t: C34.01.01.01, c: 0030}]
Show the formulaShow

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

{t: C34.01.01.01, c: 0010} + {t: C34.01.01.01, c: 0020} = {t: C34.01.01.01, c: 0030}

Where it applies, in the Bank's words (its scope):

scope({t: C34.01.01.01, r:0010;0020;0030, f: banking, fv: banking_reporting})

Every PRA banking rule on C34.01.01.01

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.