FTB-C000134 / Financial concept

Market Index

A market index is a governed numerical measure designed to represent the performance or state of a defined group of instruments.

Also known asfinancial market indexindex

Foundation 13 linked topicsPublished

Definitions

In plain terms

It combines selected constituents according to rules for eligibility, weighting, calculation, corporate actions, and maintenance.

Technical

A production index requires methodology identity and version, universe and constituents, data hierarchy, weighting, divisor or recurrence, return variant, calendar, governance, and correction policy.

Scope

An index level is not directly investable and the word index alone does not identify one methodology.

Examples

  • A governed index record identifies market index with its applicable methodology version, effective time, source, and units.

Common misconceptions

  • Market Index does not have one universal implementation without the named index methodology, data cutoff, and governance context.

Concept relationships

Narrower concepts

Related

Required by

Where this concept is used

Tutorials planned

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

  • D03-F01-A01 Prerequisite
  • D03-F01-A02 Prerequisite
  • D03-F01-A05 Prerequisite
  • D03-F02-A01 Prerequisite
  • D03-F02-A02 Prerequisite
  • D03-F02-A06 Prerequisite
  • D03-F04-A01 Prerequisite
  • D03-F04-A02 Prerequisite
  • D03-F04-A03 Prerequisite
  • D03-F04-A04 Prerequisite
  • D03-F04-A06 Important
  • D03-F05-A06 Prerequisite
  • D03-F06-A01 Prerequisite

Evidence and governance

  1. S&P Dow Jones Indices Index Mathematics Methodology S&P Dow Jones Indices · first party methodology

    Supports: preferred label, short definition, technical definition

    Limits: Authoritative for the provider's indices; conventions are not universal defaults for every index or security-level return series.

  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
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.