Credit Spreads: The Market's Price of Default & Recession Risk
Investment Grade (IG) vs High Yield (HY) spreads, Option-Adjusted Spread (OAS) mechanics, and credit cycle expansion.
1. What Are Credit Spreads?
A Credit Spread is the difference in yield between a corporate bond and a risk-free U.S. Treasury security of equivalent maturity. It compensates bondholders for taking on credit default risk, liquidity risk, and recovery uncertainty.
Corporate credit is segmented into two broad tiers:
- Investment Grade (IG): Bonds rated BBB- / Baa3 or higher by rating agencies (S&P, Moody's, Fitch). Typically issued by established blue-chip corporations.
- High Yield (HY) / Junk: Bonds rated BB+ / Ba1 or lower. Issued by leveraged corporations with higher default risk.
2. Option-Adjusted Spread (OAS)
Because many corporate bonds contain embedded call options (allowing issuers to refinance early when interest rates decline), institutional investors evaluate Option-Adjusted Spreads (OAS). OAS strips out the value of embedded options to calculate the pure credit default premium.
3. Spread Compression vs. Widening Cycles
Credit spreads expand and contract with the macroeconomic credit cycle:
Spread Widening / Blowout (Recession / Crisis): Economic deceleration, tightening bank credit standards, and rising default rates cause spreads to surge (e.g. HY OAS > 600–1000 bps).
Credit spreads are one of the most reliable leading indicators for equity bear markets because institutional credit desks trade on balance sheet solvency before equity equity valuations reflect the risk.