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

Market risk: ASA general interest rate risk (AS1 IRR): deriving total risk exposure from own funds requirements (OF91.01.01.01, Bank of England check boe_b0541)

A blocking check on the market risk: ASA general interest rate risk (AS1 IRR) template (OF91.01.01.01), in the own funds (PRA001) return.

Line4 Check does not run it on the own funds (PRA001) return. On items no template of the return has. It reads only concepts or members that none of the return’s templates has, so it can never apply to it.

Check your PRA001 return

Line4 Check does not run this check yet, so the button checks your return against the Bank's other checks for it. The validation run when you submit includes this one.

The rule in plain words

Deriving total risk exposure from own funds requirements

In row "Total General interest rate risk (GIRR)" (0010) of Market risk: ASA general interest rate risk (AS1 IRR) (OF91.01.01.01): "Total risk exposure amount" (column 0170) must equal "Own funds requirements" (column 0160) multiplied by 12.5.

This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Market risk: ASA general interest rate risk (AS1 IRR) (OF91.01.01.01)

Row

  • R0010Total General interest rate risk (GIRR)

Columns

  • C0160Own funds requirements
  • C0170Total risk exposure amount

Which returns it applies to

It is an active check of the Bank's for the own funds (PRA001) return on Bank of England banking taxonomy 4.1.1. Line4 Check does not run it yet, for the reason above. The Bank of England applies it to own funds (PRA001) returns, as a blocking check.

The Bank’s own words and formula

The first paragraph of the plain words above is the Bank of England’s own, word for word, from its list of validations. The second spells out its formula, with each cell named from its templates.

Show the formulaShow

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

{t: OF91.01.01.01, r: 0010, c: 0170} = {t: OF91.01.01.01, r: 0010, c: 0160} * 12.5

Every PRA banking rule on OF91.01.01.01

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.