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

Market risk: ASA default risk capital requirement (AS8 DRC): the gross JTD amounts for long exposures, which must be zero or positive (OF91.08.01.01, Bank of England check boe_b0425)

A blocking check on the market risk: ASA default risk capital requirement (AS8 DRC) template (OF91.08.01.01), 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.

The rule in plain words

The gross JTD amounts for long exposures, which must be zero or positive

In Market risk: ASA default risk capital requirement (AS8 DRC) (OF91.08.01.01): every value in 46 rows (listed below) in column "Long" (column 0010) 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 OF91.08.01 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: ASA default risk capital requirement (AS8 DRC) (OF91.08.01.01)

Rows

  • R0010Total Default Risk Capital Requirement (DRC)
  • R0020AAA
  • R0030AA
  • R0040A
  • R0050BBB
  • R0060BB
  • R0070B
  • R0080CCC
  • R0090Unrated
  • R0100Defaulted
  • R0110AAA
  • R0120AA
  • R0130A
  • R0140BBB
  • R0150BB
  • R0160B
  • R0170CCC
  • R0180Unrated
  • R0190Defaulted
  • R0200AAA
  • R0210AA
  • R0220A
  • R0230BBB
  • R0240BB
  • R0250B
  • R0260CCC
  • R0270Unrated
  • R0280Defaulted
  • R0290AAA
  • R0300AA
  • R0310A
  • R0320BBB
  • R0330BB
  • R0340B
  • R0350CCC
  • R0360Unrated
  • R0370Defaulted
  • R0380AAA
  • R0390AA
  • R0400A

And 6 more.

Column

  • C0010Long

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: OF91.08.01.01, 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; 0390; 0400; 0410; 0420; 0430; 0440; 0450; 0460, c: 0010} >= 0

Every PRA banking rule on OF91.08.01.01

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.