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

"Positions subject to capital charge" multiplied by 0.08 must equal "Own funds requirements" (OF21.00.01.01, Bank of England check v0623_m)

A blocking check on the market risk: standardised approach for position risk in equities (MKR SA EQU) template (OF21.00.01.01), 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 rule

The rule in plain words

In row "Specific risk" (0050) of Market risk: standardised approach for position risk in equities (MKR SA EQU) (OF21.00.01.01): "Positions subject to capital charge" (column 0050) multiplied by 0.08 must equal "Own funds requirements" (column 0060).

This is a blocking check. A return that fails it is normally rejected, so fix it before you submit. It runs only when your filing indicators mark OF21.00.01 as reported.

The cells it reads

Market risk: standardised approach for position risk in equities (MKR SA EQU) (OF21.00.01.01)

Row

  • R0050Specific risk

Columns

  • C0050Positions subject to capital charge
  • C0060Own funds requirements

Sheets

  • S0001Total
  • S0004Bulgaria
  • S0006Czech Republic
  • S0007Denmark
  • S0013Hungary
  • S0021Poland
  • S0023Romania
  • S0027Sweden
  • S0028United Kingdom
  • S0029Albania
  • S0030Japan
  • S0031Macedonia
  • S0032Russian Federation
  • S0033Serbia
  • S0034Switzerland
  • S0035Turkey
  • S0036Ukraine
  • S0037USA
  • S0038Norway
  • S0039Egypt
  • S0040Iceland
  • S0041Liechtenstein
  • S0042Other
  • S0043Croatia
  • S0044Euro Area

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:

v0623_m: [OF21.00.01.01 (All sheets)] {r0050, c0050} * 0.08 = {r0050, c0060}
Show the formulaShow

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

{t: OF21.00.01.01, r: 0050, c: 0050} * 0.08 = {t: OF21.00.01.01, r: 0050, c: 0060}

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

scope({t: OF21.00.01.01, z:0001;0004;0006;0007;0013;0021;0023;0027;0028;0029;0030;0031;0032;0033;0034;0035;0036;0037;0038;0039;0040;0041;0042;0043;0044, f: banking, fv: banking_reporting})

Every PRA banking rule on OF21.00.01.01

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.