Loan programs
There are many loan options when you finance your house purchase.
If you think you will most likely move and sell the house within 3 years, you can take a chance with an adjustable rate program.
If you think you will likely own the house for most than 3 years, it is probably best to get a fixed rate since the rates are still considered low. It is likely that interest rate will go up, though probably not that quickly.
Adjustable rate program are popular because it is easier to qualify and initial payments are more manageable. But make sure you can handle the worst case scenerio when the rate and payment adjusts. Adjustable programs always start off at a below market rate, so you can count on the rate and payment going up. Read the fine print and understand how often and how much your payment will increase.