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

(LR9) Treatment of internalised trades: a value must not be negative (LV52.00.00.01, Bank of England check boe_b0065)

A blocking check on the (LR9) Treatment of internalised trades template (LV52.00.00.01), in the contingent leverage (LVR002) return.

Line4 Check runs it on the contingent leverage (LVR002) return, proven on test files, check by check: the same outcome on all eight test files of that return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

'Cash prime brokerage', 'Synthetic prime brokerage' & 'Written credit derivatives' amount for 'Internalised (period end)' must be higher than or equal to zero

In each of "Cash prime brokerage" (row 0010), "Synthetic prime brokerage" (row 0050) and "Written credit derivatives" (row 0090) of (LR9) Treatment of internalised trades (LV52.00.00.01): every value in "Internalised (period end)" (column 0020) must be zero or more.

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. 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 LV52.00.00 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

(LR9) Treatment of internalised trades (LV52.00.00.01)

Rows

  • R0010Cash prime brokerage
  • R0050Synthetic prime brokerage
  • R0090Written credit derivatives

Column

  • C0020Internalised (period end)

Which returns it applies to

Line4 Check runs it on the contingent leverage (LVR002) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to contingent leverage (LVR002) 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: LV52.00.00.01, c: 0020}>=0

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

scope({t: LV52.00.00.01, r:0010;0050;0090, f: banking, fv: leverage 2023-05-11})

Every PRA banking rule on LV52.00.00.01

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.