The credit risk premium is the extra yield a bond pays over a Treasury of the same maturity to compensate you for the risk that the borrower defaults. If a 10-year corporate bond yields 6.5% and the 10-year Treasury yields 4.0%, the credit risk premium is 2.5 percentage points, or 250 basis points. As of late March 2026, the average option-adjusted spread on the ICE BofA U.S. Corporate Index sat near 88 basis points for investment-grade debt, though speculative-grade bonds carry spreads several times that size.1Federal Reserve Bank of St. Louis. ICE BofA US Corporate Index Option-Adjusted Spread
What the Premium Is Paying You For
The premium has three components stacked on top of each other. The first is expected loss, which combines the probability that the borrower defaults and the share of principal you lose if that happens. A 2% annual default probability and a 60% loss rate produce an expected loss of 1.2% per year. That figure is the floor. Anything below it means investors are paying to take risk.
The second component is an uncertainty buffer. Default probabilities are not fixed. A company’s odds might be 2% today and 5% in six months, and investors managing pensions or insurance reserves cannot absorb that volatility without extra pay. When the market feels nervous, this uncertainty piece can double or triple the total spread even when fundamentals have barely moved.
The third component is liquidity. A bond that trades heavily every day carries a tighter spread than an identical-risk bond that sits in a small, inactive issue. The wider bid-ask on thinly traded bonds is effectively a liquidity tax, and it can escalate quickly under stress.
How Recovery Rates Change the Premium
Recovery rates vary sharply based on where your bond sits in the capital structure, and that directly shapes the premium each class of debt demands. Senior secured bonds have historically recovered about 57.6 cents on the dollar. Senior unsecured bonds recover around 44.9 cents. Subordinated debt averages roughly 23 to 30 cents.2S&P Global Ratings. Default, Transition, and Recovery: U.S. Recovery Study
The reason is structural. In bankruptcy, federal law pays administrative costs, employee wages up to statutory caps, benefit plan contributions, and taxes ahead of general unsecured creditors, and most bondholders fall into that general unsecured group.3Office of the Law Revision Counsel. 11 U.S. Code 507 – Priorities Subordinated holders stand behind that group, and often nothing remains once senior debt has been paid.
Recovery rates also carry more variance at the bottom of the stack. Senior secured outcomes cluster within a predictable range. Subordinated recoveries swing wildly by case, and that variance itself gets priced into the spread because the downside is harder to model.
What Moves Credit Spreads
Broad economic conditions drive most of the aggregate movement. In expansions, revenues rise, defaults fall, and investors compete for yield. Spreads narrow. In recessions, defaults spike, risk appetite collapses, and spreads can blow out to multiples of their prior levels. Spreads tend to move well before the economic data confirms a turn.
Inflation adds a second layer. When prices rise quickly, fixed coupons lose purchasing power, so investors demand more yield. Central banks then raise rates to fight inflation, borrowing costs climb, and marginal companies drift toward distress. The two effects reinforce each other.
At the individual bond level, covenants matter enormously. A bond with strong restrictions on new debt, dividends, and asset stripping gives holders real protection, and investors accept a lower spread in return. Weak or absent covenants push spreads wider because management can take actions that benefit equity at bondholders’ expense. Professional buyers will sometimes treat a poorly covenanted bond as nearly uninvestable regardless of rating.
Market sentiment deserves respect too. During calm periods, the uncertainty component compresses toward zero. When fear takes hold, it explodes. That psychological premium is not noise. It represents real information about how much pain the market expects and how much of it investors are willing to absorb.
How to Calculate the Credit Risk Premium
Nominal Spread
The simplest calculation is the nominal spread, sometimes called the G-spread. Take the yield on the corporate bond and subtract the yield on a Treasury with the same maturity. A 10-year corporate at 6.5% against a 10-year Treasury at 4.0% gives a nominal spread of 250 basis points. Matching maturities matters. Comparing a two-year corporate against a 30-year Treasury would fold in a term premium that has nothing to do with credit risk.
This method is intuitive but has a blind spot. It treats the Treasury curve as flat across the bond’s life, when yields at different maturities actually follow a curve, and each of the bond’s coupon payments lands at a different point on it.
Z-Spread and Option-Adjusted Spread
The Z-spread, or zero-volatility spread, fixes that problem. It adds a constant spread to every point on the Treasury spot-rate curve until the discounted cash flows equal the bond’s market price. Instead of one yield against one benchmark, the Z-spread compares the whole payment stream against the full term structure, which matters most for long-maturity bonds where the curve bends.
For bonds with embedded options, such as callable bonds the issuer can redeem early, you need an option-adjusted spread (OAS). The OAS takes the Z-spread and strips out the value of the embedded option, leaving a purer measure of pure credit risk. A callable bond typically shows a higher Z-spread than an otherwise identical non-callable bond because the investor bears call risk on top of credit risk. The OAS removes that piece so you can compare like with like. The ICE BofA Corporate Index reports on an option-adjusted basis for this reason.1Federal Reserve Bank of St. Louis. ICE BofA US Corporate Index Option-Adjusted Spread
Credit Default Swaps
Credit default swaps offer a market-based read that isolates credit risk. In a CDS contract, one party pays a periodic fee (the CDS spread) to another in exchange for protection against default on a specific company’s debt. Because the fee reflects only default insurance, it avoids the liquidity and benchmark-curve issues that contaminate bond yield spreads. Federal Reserve research has noted that CDS spreads are “not subject to the specification of benchmark risk-free yield curve” and are “less contaminated by non-default risk components” than bond spreads.4Board of Governors of the Federal Reserve System. Credit Default Swap Spreads and Variance Risk Premia
CDS spreads and bond yield spreads on the same issuer tend to move together, but the gap between them widens during stress when liquidity dries up. Watching that gap tells you how much of the bond spread is pure credit and how much is the market charging for illiquidity.
Spread Duration and Price Sensitivity
Knowing the spread is half the picture. The other half is how much the bond’s price moves when the spread changes. Spread duration approximates the percentage price change for a one-percentage-point change in the credit spread. A bond with a spread duration of five years will drop roughly 5% if its spread widens by 100 basis points. Multiplying spread duration by the current spread gives you Duration Times Spread (DTS), a single number that captures total credit exposure. Higher DTS means larger losses when spreads widen.
Typical Spread Levels by Rating
Spreads follow a predictable pattern across the rating scale, though the exact levels shift with market conditions. AAA bonds typically trade near 40 basis points over Treasuries. A-rated bonds sit between 70 and 90 basis points. BBB bonds, the lowest investment-grade rung, usually run 100 to 120 basis points.
Below investment grade the numbers accelerate. BB bonds might trade at 180 to 200 basis points. Single-B credits often demand 275 to 325. CCC bonds can trade above 800. The relationship is not linear because each step down the scale reflects a disproportionate jump in default probability.
The dividing line sits between BBB- and BB+.5S&P Global Ratings. Understanding Credit Ratings That boundary has real consequences. Many pension funds and insurance companies have mandates that prevent them from holding speculative-grade bonds. When a company falls from BBB- to BB+, forced selling by those institutions floods the market with supply, prices fall, and spreads widen further. The premium in those situations reflects forced liquidation on top of the actual change in credit quality, and experienced analysts watch companies sitting one notch above the boundary because the risk of a downgrade-driven spiral is highest there.
After-Tax Reality for Discount Bonds
When credit risk pushes a bond’s price below face value, the tax treatment of any profit gets more complicated, and this is easy to overlook when you’re focused on the yield. If you buy a bond at a market discount because credit spreads widened, the IRS treats any gain up to the amount of accrued market discount as ordinary income, not a capital gain.6Office of the Law Revision Counsel. 26 U.S.C. 1276 – Disposition Gain Representing Accrued Market Discount Treated as Ordinary Income Ordinary rates are higher than long-term capital gains rates for most investors, so the premium you thought you were earning shrinks on an after-tax basis.
A related rule limits your ability to deduct interest expense you incurred to finance a market-discount bond. The deduction is deferred to the extent it exceeds interest income the bond generates during the year, and the disallowed portion carries forward until you sell.7Office of the Law Revision Counsel. 26 U.S.C. 1277 – Deferral of Interest Deduction Allocable to Accrued Market Discount For anyone buying distressed debt on margin, this creates a cash-flow mismatch: you owe the financing interest now but cannot deduct it until you exit. Running the after-tax math before committing is the only way to know whether the visible credit risk premium translates into an attractive return once the IRS is done with it.