Further information: Fixed income analysis § Analysis, and Corporate bond § Risk analysis
Yield spread analysis involves comparing the yield, maturity, liquidity and creditworthiness of two instruments, or of one security relative to a benchmark, and tracking how particular patterns vary over time.
When yield spreads widen between bond categories with different credit ratings, all else equal, it implies that the market is factoring more risk of default on the lower-grade bonds. For example, if a risk-free 10-year Treasury note is currently yielding 5% while junk bonds with the same duration are averaging 7%, then the spread between Treasuries and junk bonds is 2%. If that spread widens to 4% (increasing the junk bond yield to 9%), then the market is forecasting a greater risk of default, probably because of weaker economic prospects for the borrowers. A narrowing of yield spreads (between bonds of different risk ratings) implies that the market is factoring in less risk, probably due to an improving economic outlook.
The TED spread is one commonly-quoted credit spread. The difference between Baa-rated ten-year corporate bonds and ten-year Treasuries is another commonly-quoted credit spread.2
Yield spread can also be an indicator of profitability for a lender providing a loan to an individual borrower. For consumer loans, particularly home mortgages, an important yield spread is the difference between the interest rate actually paid by the borrower on a particular loan and the (lower) interest rate that the borrower's credit would allow that borrower to pay. For example, if a borrower's credit is good enough to qualify for a loan at 5% interest rate but accepts a loan at 6%, then the extra 1% yield spread (with the same credit risk) translates into additional profit for the lender. As a business strategy, lenders typically offer yield spread premiums to brokers who identify borrowers willing to pay higher yield spreads.
Credit Spread Curve, fincyclopedia.net https://fincyclopedia.net/derivatives/c/credit-spread-curve ↩
Macro Musings Blog. 26 November 2008. What Corporate Bond Yield Spreads Tell Us http://macromarketmusings.blogspot.com/2008/11/what-corporate-bond-yield-spreads-tell.html ↩