DEFINITION of 'Mortgage Par Rate'
Also, an interest rate used as a reference point for which a mortgage lender will pay another lender par value (100% of the principal balance of a mortgage) for an existing mortgage. The lender will pay a premium for mortgages with interest rates above their par rate, and a discount for mortgages with interest rates below their par rate.
BREAKING DOWN 'Mortgage Par Rate'
Par rates are also used in the valuation of mortgage servicing rights (MSR). Servicing rights on a mortgage with an interest rate above the par rate is worth less than servicing rights on a mortgage with an interest rate below the par rate. This is because the higher the interest rate on a mortgage is above the current par rate, the more likely that mortgage will prepay, which eliminates the future stream of cash flows associated with the servicing rights.