Prepayment
For accounting term
prepayment, go to
deferral.
Prepayment is repayment (
anticipation) of the total loan amount by a property owner whose
mortgage is backing a
mortgage-backed security (MBS).
Prepayment Risk is the risk of
Prepayment that a MBS-holder is exposed to.
Prepayment is perceived as an MBS
risk, because mortgage
debts are often paid off early in order to incur lower total
interest payments through cheaper refinancing. The new financing may be cheaper because the borrower's
credit rating has improved or because interest rates are lower, but in either case, the payments that
would have been made to the MBS investor would be above
market rates. Redeeming such loans early through prepayment reduces the upside of credit &
interest rate variance in an MBS. The downside of these
variances (interest rates rises or creditworthiness declines) does not normally induce a refinancing (since the fixed mortgage payments are now at below-market rates). The fact that MBS-holders are exposed to downside prepayment risk, but rarely benefit from it, means that these bonds must pay a slightly
higher interest rate than similar bonds without prepayment risk, to be attractive investments. (This is the
Option Adjusted Spread.)
To compensate for the prepayment risk (which is a
reinvestment risk),
prepayment penalty clause is often included into the loan contract.
*
PSA prepayment model
