Definitions
In plain terms
Examples include top-N shares and squared-share indexes such as HHI.
Technical
A measure must declare the share basis, eligible population, normalization, sign treatment, time, and missing-member policy.
Scope
Different concentration measures can rank the same portfolios differently.
Examples
- A Fintech Builder lesson can compute or identify Concentration Measure only after declaring its inputs, timing, and edge-case rules.
Common misconceptions
- Different concentration measures can rank the same portfolios differently.
Concept relationships
Prerequisites
Narrower concepts
Where this concept is used
Evidence and governance
- Herfindahl-Hirschman Index U.S. Department of Justice · official standard
Supports: preferred label, short definition, technical definition
Limits: Antitrust concentration thresholds do not automatically apply to index-constituent concentration; this glossary reuses only the mathematics.
- 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.