Fixed Interest Rate mortgage
The fixed-rate mortgage has long been the most popular home financing product.  With an interest rate that never changes, it provides stable, predictable monthly payments throughout the life of the loan.  Your monthly payments won't decrease if market rates go down, but you'll have the comfort of knowing you are protected if rates go up. 

If you plan to stay in your home for more than ten years (depending on the ARM rates at the time) and prefer the security of stable payments to being at the mercy of the market, a fixed-rate mortgage may be the best option for you.