Definitions
In plain terms
It shows how much of an index move came from a small group of leading contributors.
Technical
The method fixes signed or absolute ranking, N, weight timing, return definition, ties, currency, residual, and period.
Scope
A large Top-N value does not by itself mean the index has concentrated weights.
Formula
Top-N contribution = sum(C_(k), k = 1..N)C_{topN}=\sum_{k=1}^{N}C_{(k)}| Symbol | Meaning | Unit |
|---|---|---|
C_(k) | contribution of ranked constituent k | return |
N | number of selected constituents | constituents |
Output unit: return
Examples
- A Fintech Builder lesson can compute or identify Top-N Index Contribution only after declaring its inputs, timing, and edge-case rules.
Common misconceptions
- A large Top-N value does not by itself mean the index has concentrated weights.
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.