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

Market risk: ASA equity risk (AS5 EQ): total net sensitivites of equity risk (OF91.05.01.01, Bank of England check boe_b0691)

A blocking check on the market risk: ASA equity risk (AS5 EQ) template (OF91.05.01.01), 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

Total net sensitivites of equity risk

In each of 17 rows (listed below) of Market risk: ASA equity risk (AS5 EQ) (OF91.05.01.01): "Net sensitivities per risk class" (column 0030) must equal the sum of "Positive" (column 0010) and "Negative" (column 0020).

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 OF91.05.01 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: ASA equity risk (AS5 EQ) (OF91.05.01.01)

Rows

  • R0010Total Equity risk (EQU)
  • R0020Consumer goods and services, transportation and storage, administrative and support service activities, healthcare, utilities
  • R0030Telecommunications, industrials
  • R0040Basic materials, energy, agriculture, manufacturing, mining and quarrying
  • R0050Financials including government-backed financials, real estate activities, technology
  • R0060Consumer goods and services, transportation and storage, administrative and support service activities, healthcare, utilities
  • R0070Telecommunications, industrials
  • R0080Basic materials, energy, agriculture, manufacturing, mining and quarrying
  • R0090Financials including government-backed financials, real estate activities, technology
  • R0100All sectors described under buckets 1, 2, 3, 4
  • R0110All sectors described under buckets 1, 2, 3, 4
  • R0120Other sector
  • R0130Of which: Equity investment in funds calculated using the Fall-back approach
  • R0140‌Large market capitalisation, advanced economy equity indices
  • R0150Of which: Equity investment in funds calculated using the Index tracker
  • R0160Other equity indices
  • R0170Of which: Equity investment in funds calculated using the Index tracker

Columns

  • C0010Positive
  • C0020Negative
  • C0030Net sensitivities per risk class

A worked example

With simple numbers.

Illustrative values
Positive1,200
Negative800
Together2,000
What the rule then expects

Net sensitivities per risk class must then be 2,000.

2,000Passes
2,100Fails

A file that reports 2,000 passes. One that reports 2,100 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 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: OF91.05.01.01, c: 0030} = {t: OF91.05.01.01, c: 0010} + {t: OF91.05.01.01, c: 0020}

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

scope({t: OF91.05.01.01, r:0010;0020;0030;0040;0050;0060;0070;0080;0090;0100;0110;0120;0130;0140;0150;0160;0170, f: banking, fv: banking_reporting})

Every PRA banking rule on OF91.05.01.01

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.