ICE BofA US High Yield Index option-adjusted spread, the FIRST value FRED published for each date - a later revision is not what was known then.
Last observed 2026-09-17, 1 day before 2026-09-18. The value is carried forward; it is not a reading for 2026-09-18.
1 of 1 with a reading on or before 2026-09-18; 1 carried forward from an earlier day (marked). Each row is that name against its own history — core.metric_context(), one query for all of them — not a rank among them.
2025-09-25258 obs2026-09-17