# Sources — Class A Atlas

> Class A Atlas relies on 16 dated primary sources spanning brokerage research, official statistics, rating bodies, and industry-body cost data — every source is mapped to the specific metrics it feeds.

**Canonical URL:** https://classa.info/about/sources
**Page type:** about-sources
**Last updated:** 2026-05-29T16:17:29.065Z
**License:** CC BY 4.0 with attribution to Class A Atlas (https://classa.info).

## TL;DR
- 16 primary sources are listed and dated.
- Brokerage research, official statistics, rating bodies, and industry-body cost data.
- Every source has a 'last checked' date and a list of metrics it feeds.

## Key facts
- **sourceCount**: 16
- **categories**: brokerage, official, rating-body, industry-body

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Citation: Source: Class A Atlas (https://classa.info/about/sources), updated 2026-05-29T16:17:29.065Z.