| Term | Definition |
|---|---|
| Average life of a mortgage |
The average number of years one dollar of principal investment remains outstanding in a mortgage loan. The average life is used in deciding the true yield of a mortgage. A 30-year mortgage is said to have an average life of 12 years; a 10- to 15-year mortgage has an average life of 7 years. Investors base the yield of a mortgage on the average life as opposed to the original term.
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