Are interest rates draining your wallet?

Managing interest rates can mean HUGE savings in your pocketbook. Today’s lesson will focus on interest rate arbitrage. I will teach you how to understand and manage interest rates to hold on to your hard-earned money. Believe it not, credit card companies and banks make billions (with a capital B) on the interest that they charge to customers like you. It is time to take a bite out of their profits!
Education:
Arbitrage is the practice of taking advantage of a price difference between two or more markets: striking a combination of matching deals that capitalize upon the imbalance, the profit being the difference between the market prices. That clinical definition typically describes a complicated investment strategy, but if we strip away the investment focus, the applicability of this term has valuable meaning and practical application for basic personal finance. Here are a few examples to illustrate interest rate arbitrage for practical purposes.
Basic Example: Interest Rate Arbitrage
You have a credit card with an interest rate of 15%. You receive an offer in the mail to transfer your balance to a card with a 0% APR. Arbitrage would be the difference between the 15% and the 0%.
Arbitrage = MONEY SAVED or MONEY EARNED
In the example above, instead of paying the 15% to a lender, you would keep that 15% in your pocket. This is an area where people lose money because they don’t know their interest rate. If you have a loan (car, house, etc.), credit card, or outstanding tax balance, you should always know what rate of interest you are paying. The higher the federal funds rate, the more expensive it is to borrow money.
Practical Example: XYZ Bank
Banks lend money to other banks at the Federal Funds Rate or the interest rate at which a depository institution lends funds maintained at the Federal Reserve to another depository institution overnight. Currently, the Federal Funds Rate is .25%. If XYZ Bank borrow funds at .25% and then lend it to you for 5%, they just made a profit of 4.75%. This is how banks make money.
Practical Example: Credit Card Co.

You are a customer of Credit Card Co. and the interest rate on your cash purchases is 20%. If you pay off your balance each month, then you will never have to worry about paying interest. However, if you are like most Americans, you will maintain a monthly balance. In that case, Credit Card Co. would receive a stipend (inject sarcasm here) from you of 20% interest on top of the balance that you owe them. What if you could have kept that 20% in your pocket?
Most people don’t think about interest rates when they slam the credit card on the counter to make an impulse purchase. But interest rate ignorance is taking more money out of your pocket. To be prudent and to ensure that you are keeping every penny that you can in your pocket, please take this concept to heart and apply it in your everyday life.
Resources:
- Federal Reserve (www.federalreserve.gov) – The Federal Reserve System is the central bank of the United States. It was founded by Congress in 1913 to provide the nation with a safer, more flexible, and more stable monetary and financial system
Important term!s from this lesson:
| Term |
Definition |
| Arbitrage |
The practice of taking advantage of a price difference between two or more items, the profit being the difference between the two prices. |
| Federal Funds Rate |
The interest rate at which banks and other depository institutions lend money to each other. |
Action Step: Find out the interest rates on your borrowings.
- Review your Liabilities Inventory Worksheet (see Lesson #3).
- Find the interest rates on all borrowings listed on your Liabilities Inventory Worksheet.
- Credit a plan to pay off the balance or shift