FTB-C000189 / Market data field

Base Currency

Base currency is the currency unit in which a multi-currency index, portfolio, or report expresses consolidated values.

Also known asindex base currencyreporting currency

Foundation 2 linked topicsPublished

Definitions

In plain terms

Local asset values are converted into the base currency before they can be added consistently.

Technical

The contract identifies currency code, conversion direction, FX source and timestamp, holiday policy, triangulation, rounding, and methodology version.

Scope

Base currency does not remove currency risk and can differ from each instrument's trading or denomination currency.

Examples

  • A governed methodology records base currency with its source, cutoff, units, parameters, and effective version.

Common misconceptions

  • Base Currency does not have one universal implementation without the declared methodology, data basis, and constraints.

Concept relationships

Related

Contrasts with

Required by

Where this concept is used

Tutorials planned

These catalogued topics use this concept, but their complete build has not shipped yet.

  • D03-F04-A06 Prerequisite
  • D03-F04-A07 Important

Evidence and governance

  1. FTSE Currency Hedging Methodology Overview FTSE Russell, London Stock Exchange Group · first party methodology

    Supports: preferred label, short definition, technical definition

    Limits: Production rates, holidays, currencies, tenors, and calculation details require the full applicable methodology and data licenses.

  2. Fintech Builder Glossary Definition Contract The Fintech Builder · internal governed contract

    Supports: variant distinction

    Limits: Defines governed platform behavior rather than claiming these policies are universally prescribed by external McClellan methodology.

Reviewed by
fintech-builder-batch-004
Last reviewed
2026-07-27
Next review
2027-07-27
Record status
published
Written by

Fintech engineer building market-data and financial systems, and the author of every article, glossary record, and reference implementation on The Fintech Builder.