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BBB Spread

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Auto-generated. This article is rebuilt from app/signals/config/signal_definitions.json by scripts/build_signals_kb.py. Edit the registry entry and re-run the script — do not edit this file directly.

BBB Spread

What it is

BBB Spread — registry key bbb_spread.

BBB spread is subsumed by HY OAS in the credit implication; shown for context.

Data-pyramid tier

T1 — Signal. This metric sits at the signal layer of the platform’s six-tier data pyramid (T0 raw inputs → T5 actionable read). The tier reflects how far the value is from a raw measurement — not how strongly it is validated. Abstraction and validation are separate axes: a higher tier is not a claim of stronger evidence.

Horizon & validation

No validated skill horizon is on file for this metric — read it as context / a data carrier, not a validated edge. Stamps are added only when a gated research verdict lands.

Source

Source module: credit
Data source: back_fillable

Fetched directly from app/sources/credit.py; see source code for the upstream API call and any provider-specific handling.

How it’s computed

Raw ICE BofA US Corporate BBB Index Option-Adjusted Spread from FRED series BAMLC0A4CBBB, in percentage points (e.g. 1.45 = 145 bps over the matched-duration Treasury curve). BBB is the lowest investment-grade tier; widening BBB OAS is an early signal of credit stress migrating up the rating ladder. Daily FRED publication. See app/sources/credit.py:41 (_calculate_credit). The credit category’s primary score driver is hy_oas; BBB is surfaced as a confirming companion (display_only) — a BBB widening while HY OAS is benign is the textbook early-warning divergence the dashboard renders for situational awareness.

Where it surfaces

Bands / thresholds

Classifier direction: lower_is_better.

Range Label Dot Implication Points
— Tight favorable BULLISH —
— Normal leaning NEUTRAL —
— Watchful neutral NEUTRAL —
— Widening cautionary BEARISH —
— Stressed adverse BEARISH —

Health-score / alignment role

Display-only — has bands for surface labeling but does not contribute to the health score (scoring is handled by a companion metric).

Release cadence

cadence corrected 2026-06-12 (PR-4/L1-6): FRED BAMLC0A4CBBB publishes the next business morning, stored value is T-1 (app/sources/credit.py); was mislabeled intraday.

See also