DEFINITION of 'Accrual Bond'

A bond that does not pay periodic interest payments. Instead, interest is added to the principal balance of the bond and is either paid at maturity or, at some point, the bond begins to pay both principal and interest based on the accrued principal and interest to that point.

BREAKING DOWN 'Accrual Bond'

When the bond begins to pay both principal and interest based on the accrued principal and interest at that point, this is known as a Z tranche and is common in collateralized mortgage obligations (CMOs). In a CMO that includes a Z tranche, the interest payments that otherwise would be paid to the Z-tranche holder are used to pay down the principal of another tranche. After that tranche is paid off, the Z tranche begins to pay down based on the original principal of the tranche plus the accrued interest.

Similar to a zero-coupon bond, an accrual bond or Z tranche has limited or no reinvestment risk. However, accrual bonds, by definition, have a longer duration than bonds with the same maturity that make regular interest or principal and interest payments. As such, accrual bonds are subject to greater interest rate risk than bonds that make periodic payments over their entire terms.

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RELATED FAQS
  1. What is a Z bond in a collateralized mortgage obligation (CMO)?

    Learn about Z-bonds, which are the riskiest level of tranches in collateralized mortgage obligations, and understand how ... Read Answer >>
  2. What is accrued interest, and why do I have to pay it when I buy a bond?

    A bond represents a debt obligation whereby the owner (the lender) receives compensation in the form of interest payments. ... Read Answer >>
  3. Why Do Most of My Mortgage Payments Start Out as Interest?

    When you make a mortgage payment, the amount paid is a combination of an interest charge and principal repayment. Over the ... Read Answer >>
  4. Do long-term bonds have a greater interest rate risk than short-term bonds?

    There is a greater probability that interest rates will rise within a longer time period than within a shorter period. One ... Read Answer >>
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