banks had 30 years loan to home owner for an interest rate of 3.0 or 3.5 which they made a couple of years back. Now that the interest rate is going up, let's say for a reasonable rate, you go to bank to do a time deposit for 2 years or 5 years, like in the 90s, you can easily get an annual rate between 3percent to 5 percent for these time deposit. So how can the bank make the money, let's say 3 years or 4 years from now if the interest rate keep going up.
This conclude the following two things:
1): All of these banks will go underwater if interest rate going up.
2): Interest rate will never go up a lot again because of these 30 years loan. ( lower interest rate is like another way of inflation, you simply cannot go back)