A. Done in excel. In 2011, I took out a 30 year mortgage that was a 5 yr ARM for 2.875. At the time, I could have taken out a 3.875 30 year fixed loan. My five year loan was a 2/6 cap. If the worse thing occurred, and my interest rate went to 4.875% for year 6, 6.875% year 7, 8.875% from year 8 to 30, at what month would my ARM become worse than taking the 30 year fixed loan. Do not consider inflation in this calculation.

Note: When calculating my payments for year 6, it would have been 4.875% amortized over 25 years. The 6.875% is over 24 years, etc.