Back-end yield is a yield measure tied to the later cash flows of a fixed-income security, such as principal repayments or longer-dated payments toward the end of the term, rather than the near-term coupons.
Investors compare back-end yield across securities with different cash-flow patterns to gauge how much income is expected from the later years. It is particularly relevant for amortizing loans, mortgage-backed securities (MBS), and other structures where principal declines over time. In practice, analysts may model or isolate the yield contributed by back-end cash flows under a given prepayment or call scenario, separate from front-end coupons.
Back-end yield is not a standardized, universally quoted metric. Its calculation depends on assumptions about prepayments, calls, reinvestment rates, and the instrument's amortization schedule. As a result, it should be interpreted alongside conventional measures such as yield to maturity or yield to call, and used to illuminate the long-dated income component rather than to drive buy/sell decisions alone.
In a 30-year MBS with substantial mid-life prepayments, the back-end yield may reflect the income from the remaining principal repayments in later years under a specified prepayment scenario.
An analyst notes that the back-end yield of a 30-year MBS under a moderate prepayment scenario concentrates cash flows in the later years, affecting how it compares with a non-amortizing bond.
Yield to Maturity · Yield to Call · Prepayment Risk · Amortizing Bond · Cash Flow · Sinking Fund