Lag response of prepayments

Lag response of prepayments

A delay of typically about three months between the time the weighted-average coupon of an MBS pool crosses the threshold for refinancing and observation of an acceleration in prepayment speed is observed.

Lag Response of Prepayments

The time between the point at which interest rates falls to the point at which it become advantageous for mortgage borrowers to refinance their mortgages and the point at which prepayments actually increase. The lag response of prepayments is usually about three months and can be used to determine changes to the prepayment rate of mortgage-backed securities.