Definitions
In plain terms
It places contribution concentration on a zero-to-one scale while avoiding cancellation between positive and negative contributors.
Technical
The method freezes selected set, signed-to-absolute transformation, denominator scope, residual treatment, and zero-denominator policy.
Scope
It does not equal a weight share and does not preserve the sign of the index return.
Formula
Contribution share = sum_selected(abs(C_i)) / sum_all(abs(C_i))CS=\frac{\sum_{i\in S}|C_i|}{\sum_i|C_i|}| Symbol | Meaning | Unit |
|---|---|---|
C_i | constituent return contribution | return |
S | selected contributor set | constituents |
Output unit: ratio
Examples
- A Fintech Builder lesson can compute or identify Contribution Share only after declaring its inputs, timing, and edge-case rules.
Common misconceptions
- It does not equal a weight share and does not preserve the sign of the index return.
Concept relationships
Prerequisites
Where this concept is used
Evidence and governance
- 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.
- Reviewed by
- fintech-builder-batch-005
- Last reviewed
- 2026-07-27
- Next review
- 2027-07-27
- Record status
- evidence reviewed
This record is evidence-reviewed and readable, but not yet promoted to published — it is served noindex,follow and excluded from the sitemap.