The HY OAS is the extra yield junk-rated corporate bonds pay over comparable Treasuries — real credit-market pricing, not a survey.
ICE BofA's US High Yield Index Option-Adjusted Spread (FRED ticker BAMLH0A0HYM2) strips out embedded call-option value and reports the spread over the Treasury curve in percentage points, published daily. Widening means junk bonds are cheapening relative to Treasuries; narrowing means credit markets are getting more comfortable.
A widening spread is one of the more reliable early-warning signals in market history — credit investors reprice risk before equity markets fully catch up, since a bond default destroys principal directly while a stock decline is "just" a paper loss until sold.
Live example: Quantustik's composite Market Conditions verdict as of 2026-07-20T02:00:27.290220+00:00 is “Caution”, one input to which is the current high-yield credit spread reading. For the exact current HY OAS level in basis points, see FRED's BAMLH0A0HYM2 series directly — Quantustik doesn't cache that raw number as a standalone field yet.
It is one of roughly a dozen signals composed into the market Market Conditions score alongside the VIX, the yield curve, market breadth and sentiment — a widening spread nudges market conditions toward caution/risk-off and argues for smaller position sizes platform-wide, independent of how any single ticker's own forecast looks.
Bond investors are demanding more compensation to hold junk-rated debt — real capital being repriced for more perceived default risk.
It has historically tended to widen before equity drawdowns, but it is a leading context signal, not a guaranteed timing tool.
FRED publishes ICE BofA's series (BAMLH0A0HYM2) daily — Quantustik's market-conditions model consumes the same series.
Browse all S&P 500 tickers to see this metric applied to individual companies.
Educational research only — not investment advice.