Treasury yields (11 tenors), credit spreads (BAML OAS AAA-CCC), SOFR, FX (5 pairs), commodities, inflation breakevens
| type | api |
| url | https://api.stlouisfed.org/fred/ |
| auth | api_key (FRED_API_KEY) |
| cost | free |
| update frequency | daily |
| consumers | finview, insmodel, gold_copy |
| classification | public_market |
Primary rate and spread source. Three independent fetcher implementations per ADR-001. FinView's canonical impl is the data_layer/fetchers/fred/ package (post the D3-31 refactor, FinView PR