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30Y auction bid-to-cover (latest)

What it is

30Y auction bid-to-cover (latest) — registry key auction_30y_bid_to_cover.

Bid-to-cover ratio of the most recent 30-year bond auction - the headline demand read. long-end supply-stress carrier, Phase 3A of improvements/long-end-stress.md; scoring deferred to a pre-registered study. Nominal coupons only; TIPS are excluded via inflation_index_security (Fiscal Data labels 30Y TIPS ‘Bond’, 10Y TIPS ‘Note’).

Data-pyramid tier

T0 — Raw input. This metric sits at the raw input 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: treasury_auctions
Data source: back_fillable

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

How it’s computed

Latest 30Y coupon auction’s bid_to_cover_ratio (max auction_date on the auction_30y_bid_to_cover macro_series series). See app/sources/treasury_auctions.py:latest_auction_carriers.

Where it surfaces

• API field: us_supply.auctions.30y.bid_to_cover on GET /api/v1/signals/latest
• Surface: daily_signals row (daily-cadence persistence)

Health-score / alignment role

Data carrier — no implication, no health-score contribution.

Persisted for downstream consumers (sparklines, base-rate matcher, calibration substrate) but does not classify into BULLISH / NEUTRAL / BEARISH and does not contribute to the 0-100 health score.

Release cadence

• Publishes: ad_hoc
• Lag days: 1

US Treasury coupon auction, per auction day (event-driven).

See also

• /kb/api/get-signals-latest — API endpoint that serves this field.