Asset Swap Spreads

Comparing bonds by their raw yield can mislead, because two bonds with the same yield can have very different coupon structures, and a fixed-coupon bond's price is sensitive to interest-rate moves in a way that obscures its pure credit risk. An asset swap packages a fixed-rate bond together with an interest-rate swap that exchanges its fixed coupons for floating-rate payments, leaving an investor holding what behaves economically like a floating-rate note.

The asset swap spread is the extra amount, over the floating benchmark rate, that the package pays — and because the swap has neutralized the interest-rate exposure, that spread reflects the bond's credit and liquidity risk much more cleanly than the raw yield does. This makes asset swap spreads a common way for credit traders to compare bonds with very different coupons and maturities on a like-for-like basis.

Worked example. A 5-year corporate bond yields 6% while a comparable 5-year swap rate is 4.5%. Packaged as an asset swap, an investor might receive the floating benchmark rate plus a spread of roughly 150 basis points, isolating the bond's credit premium from the coincidence of its particular coupon and price.