Say you take a 7 ARM at 2% instead of 3% for a 700k mortgage. You're saving $50,000 in interest during the first 7 years. That's 7% of your mortgage. Then 7 yea

Say you take a 7 ARM at 2% instead of 3% for a 700k mortgage. You're saving $50,000 in interest during the first 7 years. That's 7% of your mortgage. Then 7 years of inflation can knock down your principle further which might be pretty high over the next 7 years. It can make sense if you're financially secure enough to take on the risk.