Who Decides What Mortgage Interest Rates Are?North Florida NewsDaily, FL -3 hours agoThis is because the average mortgage loan is only open about eight years before it is paid off or refinanced, so lenders/investors calculate what they can ... Looking for a home mortgage usually involves you, your money, and a bank officer or a mortgage broker. So what's the big deal? You ask. The end result is the same - you get a mortgage; you get a new house. But these two job types are different and it is important that you at least understand that difference.