The Motley Fool Discussion Boards Previous Page Personal Finances / Buying or Selling a Home URL:  http://boards.fool.com/number-crunching-30563441.aspx Subject:  Number Crunching Date:  2/26/2013  6:33 PM Author:  timk777 Number:  124848 of 128887 I hope this is the "right" board to ask this question. I'm trying to determine how long a 3-year ARM will beat a 5-year ARM if the rate changes 1% after 3 years.Loan A: \$3MM -- 20 yr. amortization -- 3.2% first 3 years -- then resets for another 3 years, etc. until maturity. (Reset = prime + 0.35%)Let's say, after 3 years, the rate moves to 4.2%.Loan B: \$3MM -- 20 yr. amortization -- 3.6% first 5 years -- then resets for another 5 years, etc. until maturity. (Reset = prime + 0.55%)Let's say, after 5 years, the rate moves to 4.6%.Then, after year 6 on Loan A, the rate also moves to 4.6%.Which loan is better for the first six years? Hoping to repay or refinance after six years.Thanks in advance for your help,Tim Copyright 1996-2018 trademark and the "Fool" logo is a trademark of The Motley Fool, Inc. Contact Us