Although they are normally cast in a negative light, adjustable rate mortgages might be used to your advantage. If you know that you may only be in the home for 5 years or less, you may be able to reduce your interest expense. And if you make payments based on what it would have been for a fixed rate, those additional funds will help build equity. Your mortgage professional can help guide you through the decision making process and help determine if an ARM is right for you.