Concept

Credit Spreads

Credit Spreads are Breadth, Sentiment & External Data concepts. A reference entry: the Library explains it rather than implements it.

HY OAS

What are credit spreads?

Credit spreads are the extra yield corporate bonds pay over comparable government bonds, compensation for bearing default and liquidity risk. The benchmark traders quote most is the ICE BofA US High Yield Option-Adjusted Spread (HY OAS), covering the US junk bond universe; its investment-grade counterpart (IG OAS) tracks higher-quality issuers.

Spreads act as a risk-appetite thermometer for the whole market. Tight spreads mean credit investors are relaxed and corporate financing is cheap. Widening spreads mean investors are demanding more compensation for default risk, and because credit sits senior to equity in the capital structure, that stress often shows up in spreads before or alongside equity drawdowns.

For rough calibration: HY OAS has traded near or below 300 basis points in the most exuberant markets, crossed 1,000bp in the March 2020 shock, and peaked above 2,000bp in late 2008. Most practitioners weight the trend and the speed of change over the absolute level.

Why there's no indicator for this

An option-adjusted spread is index analytics, not chart math. Computing HY OAS requires prices for every constituent bond, models to strip out embedded call options, and the full Treasury curve, all maintained by the index provider under license. The series is published once daily (FRED redistributes it as BAMLH0A0HYM2) and cannot be derived from any equity, futures, or crypto symbol's price and volume.

Honest proxies do exist on-chart: ratio charts of high-yield ETFs against Treasury or investment-grade ETFs track credit risk appetite in real time. But ETF price ratios embed duration mismatch, distributions, and premium/discount noise. They can suggest spreads are widening; they cannot tell you the spread in basis points, and they drift from the true series exactly when precision matters most.

How to read credit spreads

The data is free and daily; the skill is in the context:

  1. 1Pull the series: FRED publishes HY OAS (BAMLH0A0HYM2) and IG OAS daily, with history back to the 1990s.
  2. 2Place the level: sub-350bp is historically tight for high yield, while sustained moves through 500bp have accompanied genuine growth scares.
  3. 3Weight the rate of change: a widening of 50-100bp inside a few weeks says more than any static level.
  4. 4Compare HY with IG: high yield widening alone points to sector or idiosyncratic stress; both widening together reads systemic.
  5. 5Check volatility agreement: spreads widening while the VIX stays quiet is a divergence worth respecting.

How traders use it

  • Regime filtering: swing and trend traders reduce equity exposure or tighten risk when spreads are in a widening trend, treating credit as a slower, sturdier risk dial than price.
  • Divergence spotting: equity indices making highs while HY OAS grinds wider is a classic late-cycle warning, typically examined with intermarket analysis and breadth measures such as New Highs − New Lows.
  • Stress dashboards: credit spreads, implied volatility, and dollar behavior (see DXY correlation regimes) are read together; agreement across them carries more weight than any single input.
  • Intraday nowcasting: between daily prints, desks watch high-yield ETFs against Treasuries as a rough real-time spread proxy.

Credit spreads vs other risk dials

VIX: Prices expected equity volatility over the next month from options; spreads price default risk over years. The VIX spikes and mean-reverts quickly, while spreads trend and persist.

Fear & Greed Index: A blended, retail-facing sentiment composite. HY OAS is a single, precisely defined institutional series with decades of history, better suited to regime work.

Related concepts · Macro/intermarket

Intermarket Analysis3DXY Correlation Regimes1Yield Curve0Real Yields0Macro Event Playbooks0ES Fair-value Basis0

Concept family

Breadth, Sentiment & External Data

63 concepts mapped · 61 in the Library

Credit Spreads FAQ

What does OAS stand for?

Option-adjusted spread: the yield spread over the Treasury curve after modeling out the embedded options, mostly call features, in corporate bonds. The adjustment makes differently structured bonds comparable in one index.

Where can I see credit spreads for free?

FRED, the St. Louis Fed's database, republishes the ICE BofA HY and IG OAS series daily, and platforms with FRED integrations can display them as chartable symbols.

Do credit spreads lead the stock market?

Not mechanically. Credit stress has preceded or confirmed equity trouble in slow-building episodes and moved simultaneously in fast shocks. Treat spreads as regime context and confirmation rather than a timing signal.

What counts as wide or tight?

Rules of thumb only: high-yield spreads near 300bp are historically tight, mid-400s unremarkable, and moves toward 800bp and beyond have coincided with recessions or acute stress. Distributions shift across cycles, so recent ranges matter.

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