An Adjustable Rate Mortgage (ARM) may be your best choice. ARMs usually have lower initial rates than fixed-rate loans, and there are caps on both rate and monthly payment increases. However, once your loan does start adjusting (commonly in 5, 7, or 10 years, depending on your loan terms), your rate and payments will be determined by the market index for the loan. You could also experience negative amortization, meaning the payments don’t cover the interest on the loan and your loan balance will increase.