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

Every value in 10 rows in column "Own funds requirements" must be zero or more (OF22.00.01.01, Bank of England check v3785_s)

A blocking check on the market risk: standardised approaches for foreign exchange risk (MKR SA FX) template (OF22.00.01.01), 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.

Check your file for this ruleWhat to do if it fails

The rule in plain words

In Market risk: standardised approaches for foreign exchange risk (MKR SA FX) (OF22.00.01.01): every value in 10 rows (listed below) in column "Own funds requirements" (column 0090) 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 OF22.00.01 as reported.
  4. 04This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Market risk: standardised approaches for foreign exchange risk (MKR SA FX) (OF22.00.01.01)

Rows

  • R0010Total positions
  • R0020Currencies closely correlated
  • R0030All other currencies (including CIUs treated as different currencies)
  • R0040Gold
  • R0050Additional requirements for options (non-delta risks)
  • R0060Simplified method
  • R0070Delta plus approach - additional requirements for gamma risk
  • R0080Delta plus approach - additional requirements for vega risk
  • R0085Delta plus approach - non-continuous options and warrants
  • R0090Scenario matrix approach

Column

  • C0090Own funds requirements

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 blocking check.

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:

v3785_s: [OF22.00.01.01 (r0010;0020;0030;0040;0050;0060;0070;0080;0085;0090, c0090)] >= 0
Show the formulaShow

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

{t: OF22.00.01.01, r: 0010; 0020; 0030; 0040; 0050; 0060; 0070; 0080; 0085; 0090, c: 0090} >= 0

Every PRA banking rule on OF22.00.01.01

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.