FTB-C000140 / Formula component

Index Divisor

An index divisor is a maintained scaling denominator that converts an index's aggregate numerator into index points.

Also known asdivisor

Intermediate Formula defined 14 linked topicsPublished

Definitions

In plain terms

The divisor sets the starting level and can be changed to preserve continuity when corporate actions or constituent changes alter the numerator mechanically.

Technical

For a divisor-based index, level equals the eligible aggregate market value or price sum divided by the divisor; every divisor change needs effective time, cause, old and new state, and precision.

Scope

Divisor rules depend on the index methodology and are not interchangeable across price-weighted and capitalization-weighted indices.

Formula

D = MV / I
LaTeX: D=MV/I
SymbolMeaningUnit
MVeligible index numerator or market valuemethodology numerator unit
Itarget index levelindex points

Output unit: numerator units per index point

Examples

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

Common misconceptions

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

Concept relationships

Prerequisites

Related

Required by

Where this concept is used

Tutorials planned

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

  • D02-F02-A04 Important
  • D03-F01-A01 Important
  • D03-F01-A02 Primary
  • D03-F01-A03 Primary
  • D03-F01-A04 Primary
  • D03-F01-A05 Important
  • D03-F02-A01 Important
  • D03-F02-A02 Important
  • D03-F02-A03 Important
  • D03-F02-A06 Important
  • D03-F04-A01 Important
  • D03-F04-A02 Important
  • D03-F04-A03 Important
  • D03-F04-A05 Important

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, formula

    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.