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In forceCredit institutions: national prudential returns (national)Last checked 11 November 2026

Proprietary trading activities report (TREP_CON, TREP_IND)

A regulatory return listed by the National Bank of Belgium (NBB), Belgium.

Quarterly quantitative tables and a qualitative compliance report on proprietary trading, under the NBB regulation of 1 April 2014 on proprietary trading and Articles 117 to 133 of the Banking Act. The tables track the two significance thresholds (volume-based and risk-based) that can trigger an own funds add-on, the risk (diversified VaR), daily results, trading volumes and the effectiveness of hedging. Circular NBB_2025_17 lightened the reporting from 25 November 2025 (no more holding period data; table 05.00 'not applicable'). Source

Official title: Trading reporting (TREP); reporting périodique qualitatif et quantitatif concernant l'activité de négociation pour compte propre

The facts

Who files
Belgian credit institutions that take deposits or issue debt instruments covered by the Belgian deposit protection scheme. Institutions meeting the de minimis conditions of Article 94 of the CRR are exempt from the quantitative reporting; institutions with volume-based threshold under 1.5% and risk-based threshold under 0.5% only report tables 06.00, 07.00 and, if produced internally, VaR data (08.00). The qualitative compliance report goes to all in scope. Source
How often
Quarterly quantitative tables (reference dates 31 March, 30 June, 30 September, 31 December); the qualitative compliance report yearly for significant institutions and every two years for less significant ones, as a section F of the management report on internal control. Source
Deadline
Quarterly data at the latest 2.5 months after the reference date: 15 June (Q1), 15 September (Q2), 15 December (Q3) and 15 March (Q4), or the next working day. Source
Format
XBRL-XML. XBRL in OneGate domain MBS (reports TREP_CON and TREP_IND), NBB TREP taxonomy 1.0.2 (2015-01); amounts in EUR. The OneGate protocol gives TREP 'high' accuracy for decimals. Source
How it is filed
Filing routes recorded for the NBB: OneGate; NBB Supervision. See how firms file with the NBB.
Status
In force
Legal basis
Group
Credit institutions: national prudential returns (national)

Templates (20)

The tables and forms inside the return. Plain name first, the NBB's code in brackets.

  • Type of report (T_00.01)
  • Quarterly volume of external trading activities (T_01.00)
  • Risk-mitigating character and degree of use of limits (a) (T_02.00.a)
  • Risk-mitigating character and degree of use of limits (b) (T_02.00.b)
  • Risk-mitigating character and degree of use of limits (c) (T_02.00.c)
  • External and internal clients plus market making, before hedging (T_03.01)
  • External and internal clients plus market making, after hedging (T_03.02)
  • Other trading activities after hedging (T_03.03)
  • Analysis of daily results (T_04.00)
  • Assets by trading room and trading desk (T_05.01.a)
  • Total assets by trading room (T_05.01.b)
  • Liabilities by trading room and trading desk (T_05.02.a)
  • Total liabilities by trading room (T_05.02.b)
  • Volume-based threshold - FINREP/Scheme A (T_06.01.a)
  • Volume-based threshold - FINREP/Scheme A, consolidated basis (T_06.01.b)
  • Volume-based threshold - FINREP/Scheme A (c) (T_06.01.c)
Show all 20 templates
  • Volume-based threshold - ratio (T_06.02)
  • Risk-based threshold - COREP (T_07.01)
  • Risk-based threshold - ratio (T_07.02)
  • Fortnightly VaR reporting (1 day) (T_08.00)

Tables of the NBB TREP taxonomy 1.0.2 linked on the MBS XBRL page, names translated from the French labels. Circular NBB_2025_17 (Annex 1, chapter III) groups them as tables 01.00 to 08.00 and marks 05.00 (holding periods) 'not applicable'. Source

Validation rules

78 rules, as counted from the NBB's published material. Software can run them exactly as published. Source

How they are written: XBRL Formula 1.0 assertions in the NBB TREP taxonomy package (VAL).

The MBS page also links rule lists in Dutch and French (trep_2015_nl.xlsx, trep_2015_fr.xlsx) that the NBB's robots.txt does not allow to be read.

The rules, on nbb.be

How they were counted

XBRL formula assertions in the val folder of www-nbb-be_trep_102_val.zip (TREP 1.0.2): 76 value assertions and 2 existence assertions.

Counts are in the NBB's own unit, so they are not comparable with other regulators' counts.

Public data

No published data from this return was found. No data from this return published by the NBB was found on the pages checked. Source

Official documents (8)

The NBB's own files, with the size and SHA-256 fingerprint of each as downloaded on 11 November 2026, so anyone can tell whether a copy is the same version.

Sources

Every page and document this return's facts were read from.

Knowing exactly what is collected, in what format and under which rules is the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.

Line4's text and records here are free to reuse under CC BY 4.0. Please credit: “Source: Line4 regulatory submissions library (CC BY 4.0), https://www.line4.ai”. The regulators' documents, forms, taxonomies, rules and data belong to them: see NBB's reuse terms. This describes what regulators publish. It is not legal or regulatory advice: always rely on the regulator's own text.

Source: National Bank of Belgium (https://www.nbb.be). Documents copied here are unchanged and are available free of charge on the NBB's website. The plain-English summaries are Line4's own; the NBB does not endorse this library.

Last checked 11 November 2026.