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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): total negative unweighted delta senitivities of GIRR, which must be zero or less (OF91.01.01.01, Bank of England check boe_b0408)

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. Held back, never run on a test file. It never runs on any test file of the return, so it cannot be proven yet. It is held back until it is proven.

Check your PRA001 returnWhat to do if it fails

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

Total negative unweighted delta senitivities of GIRR, which must be zero or less

In Market risk: ASA general interest rate risk (AS1 IRR) (OF91.01.01.01): every value in 38 rows (listed below) in column "Negative" (column 0020) must be zero or less.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Compare the values in your return. If the first is bigger than it may be, one of them is wrong: check both before you change either.
  3. 03This 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)

Rows

  • R0010Total General interest rate risk (GIRR)
  • R0020GBP
  • R0030USD
  • R0040EUR
  • R0050JPY
  • R0060AUD
  • R0070CAD
  • R0080SEK
  • R0090HKD
  • R0100CHF
  • R0110NZD
  • R0120KRW
  • R0130SGD
  • R0140MXN
  • R0150NOK
  • R0160ZAR
  • R0170DKK
  • R0180ILS
  • R0190CNY
  • R0200RUB
  • R0210TRY
  • R0220BRL
  • R0230SAR
  • R0240COP
  • R0250PEN
  • R0260AED
  • R0270INR
  • R0280PLN
  • R0290TWD
  • R0300HUF
  • R0310MYR
  • R0320CZK
  • R0330THB
  • R0340CLP
  • R0350IDR
  • R0360Other 1 (This would be the top 10 most material currencies not listed from rows '0020'-'0350')
  • R0370Other 2 (This would be the next top 10 most material currencies not listed from rows '0020'-'0350' and not included in row '0360')
  • R0380Other remaining currencies (This would be the currencies not listed from rows '0020'-'0350' and not included in rows '0360' & '0370')

Column

  • C0020Negative

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; 0020; 0030; 0040; 0050; 0060; 0070; 0080; 0090; 0100; 0110; 0120; 0130; 0140; 0150; 0160; 0170; 0180; 0190; 0200; 0210; 0220; 0230; 0240; 0250; 0260; 0270; 0280; 0290; 0300; 0310; 0320; 0330; 0340; 0350; 0360; 0370; 0380, c: 0020} <= 0

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.