This can be a possibility in a declining interest rate environment where you decide to move from a fund paying decreasing levels of interest to another fund with a higher yield. (bondfunds.com)
Each month, the homeowner pays decreasing amounts of interest and increasing amounts of principal while the payment stays constant. (themortgagereports.com)
The policy holder is required to pay monthly premiums but in the long run, the amount that insurance carriers need to pay decreases upon the death of the insured. (usacoverage.com)