Credit and leverage
US Investment Grade OAS
The US investment-grade option-adjusted spread, a gauge of higher-quality credit risk premium.
At a glance
US Investment Grade OAS: latest value and prior change
As of 2026-07-21, US Investment Grade OAS is 0.78 %. It is unchanged from 0.78 % on 2026-07-20.
Across 815 available observations from 2023-05-30 to 2026-07-21, the latest value is at the tie-adjusted 13th percentile.
- Observed on
- Default comparison window
- 2023-05-30–2026-07-21
- Observations · observed cadence
- 815 · Daily
- Data source
- FRED
A high or low percentile does not by itself make the indicator positive, negative, or a buy or sell signal.
Time-series chart
US Investment Grade OAS
2023-05-30–2026-07-21
Long-history series are stored as real provider observations. Index, FX, VIX, and ratio charts use historical backfill where providers expose it; Korean investor flow and margin-credit feeds expand as stable historical endpoints become available.
Interpretation guide
US Investment Grade OAS: detecting cracks in high-quality credit
US Investment Grade OAS is the option-adjusted spread between BBB-and-above corporate bonds and Treasuries, calculated by ICE BofA and published daily on FRED. It is the risk premium attached to funding costs for large, high-quality US companies — so when this spread stirs, unease has reached the safest layer of the credit market.
Small moves, heavy meaning
Investment-grade spreads trade in a far narrower band than high yield, typically hovering around 1% (100bp). That compression means a widening of 30-40bp can carry as much information as a multi-point surge in high yield.
- Readings around 1% describe a calm, well-functioning high-grade credit market.
- Widening beyond 1.5% marks a caution zone where funding strain is reaching even quality issuers.
- Moves above 2% have historically belonged to severe credit crunches; the 2008 episode pushed the spread past 6%.
What actually drives it
Investment-grade bonds respond less to outright default risk and more to downgrade risk, market liquidity, and issuance supply. When the BBB tier — the bottom rung of investment grade — is large, fear of fallen angels dropping into high yield becomes a meaningful spread driver.
- IG widening in tandem with high-yield widening reads as broad credit-market risk aversion.
- IG widening in isolation points first to supply-demand factors such as heavy issuance or rate volatility.
- Spread and Treasury yield are separate components; judge total funding cost for quality issuers by combining both.
Monitoring routine and caveats
Deep structural demand from pensions and insurers keeps IG spreads unusually stable in normal times. Anomalies are therefore rare — which is exactly why they carry outsized information value when they appear.
- View it with US High Yield OAS and the US Treasury 10Y on TapeFlow to separate credit premium from rate pressure.
- A quiet, persistent uptrend in IG spreads can be an early sign of credit deterioration even without a headline-grabbing high-yield spike.
- Rising funding costs for top US corporates reset the benchmark for global corporate debt, influencing Korean issuers' dollar-bond conditions as well.