Why conditional prepayment rate(CPR) increases as mortgage ages?

Why conditional prepayment rate(CPR) increases as mortgage ages?

Who knows ~~~~~?

People refinance their loans or sell their homes. The older the mortgage, the more likely that:

  • The homeowner will have substantial equity and will refinance to access that equity
  • The homeowner will be sick and tired of living in the same old house and will move into a new house