The guarantees thirty-year loans with a choice of repayment plans: Traditional fixed payment (constant principal and interest); Graduated Payment Mortgage, or GPM (low initial payments which gradually rise to a level payment starting in the sixth year); and in some areas, Growing Equity Mortgages, or GEMs (gradually increasing payments with all of the increase applied to principal, resulting in an early payoff of the loan). There is no prepayment penalty.