Definitions
In plain terms
It can measure participation inside each sector or compare directional sector outcomes across the market.
Technical
A specification freezes taxonomy, point-in-time members, security-level signal, aggregation, weighting, cutoff, and missing groups.
Scope
It is not one fixed indicator and should not mix taxonomy versions silently.
Examples
- A Fintech Builder lesson can compute or identify Sector Breadth only after declaring its inputs, timing, and edge-case rules.
Common misconceptions
- It is not one fixed indicator and should not mix taxonomy versions silently.
Concept relationships
Prerequisites
Broader concepts
Where this concept is used
Evidence and governance
- Business Cycle Indicators: Diffusion Indexes The Conference Board · first party methodology
Supports: preferred label, short definition, technical definition
Limits: Applying the general diffusion construction to sectors or factor groups is a declared Fintech Builder adaptation.
- 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.