Line4

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

Market risk: standardised approaches for position risk in commodities (MKR SA COM): a total must equal the sum of its parts (OF23.00.01.01, Bank of England check v0633_m)

A blocking check on the market risk: standardised approaches for position risk in commodities (MKR SA COM) template (OF23.00.01.01), 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 each of 5 columns (listed below) of Market risk: standardised approaches for position risk in commodities (MKR SA COM) (OF23.00.01.01): "Total positions in commodities" (row 0010) must equal the sum of "Maturity ladder approach" (row 0070), "Extended maturity ladder approach" (row 0080) and "Simplified approach: All positions" (row 0090).

The headline gives only the template and the kind of check, because the rule is too long to say in a headline. The plain words above say all of it.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Add up the parts in your return and compare the result with the total.
  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.
  4. 04The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  5. 05It runs only when your filing indicators mark OF23.00.01 as reported.
  6. 06This 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 position risk in commodities (MKR SA COM) (OF23.00.01.01)

Rows

  • R0010Total positions in commodities
  • R0070Maturity ladder approach
  • R0080Extended maturity ladder approach
  • R0090Simplified approach: All positions

Columns

  • C0010Long
  • C0020Short
  • C0030Long
  • C0040Short
  • C0050Positions subject to capital charge

A worked example

With simple numbers.

Illustrative values
Maturity ladder approach1,200
Extended maturity ladder approach800
Simplified approach: All positions450
Together2,450
What the rule then expects

Total positions in commodities must then be 2,450.

2,450Passes
2,550Fails

A file that reports 2,450 passes. One that reports 2,550 fails, by 100.

The numbers are illustrative, reported to the unit, so the rounding tolerance does not change the result.

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:

v0633_m: [OF23.00.01.01 (c0010;0020;0030;0040;0050)] {r0010} = {r0070} + {r0080} + {r0090}
Show the formulaShow

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

{t: OF23.00.01.01, r: 0010} = {t: OF23.00.01.01, r: 0070} + {t: OF23.00.01.01, r: 0080} + {t: OF23.00.01.01, r: 0090}

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

scope({t: OF23.00.01.01, c:0010;0020;0030;0040;0050, f: banking, fv: banking_reporting})

Every PRA banking rule on OF23.00.01.01

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.