What are floating rates?
A floating interest rate, also known as a variable interest rate, is an interest rate that is continuously moving with the rest of the market. Floating rates refer to any debt instrument, including loans, bonds, mortgages, or credits, that do not have a fixed rate of interest over the payback period. The rate varies over the duration of the debt obligation compared to a fixed interest rate, which is a rate that stays constant for the duration of the debt obligation. Floating interest rates will change based on a reference rate, typically an Index.
How do they work?
The rate on a floating rate debt instrument is typically referred to as a spread or margin over the base rate. To calculate the rate, you add the spread/margin defined by the lender plus the rate that is determined by the index tied with the debt instrument.
Debt instruments with floating rates will typically cost less than fixed rate loans. Because the borrower is paying a lower loan rate in the beginning, they are taking on interest rate risk, which is the risk that rates will go up in the future.
Mortgages with Floating Rates
Adjustable-rate mortgages (ARMs), which are mortgages that utilize floating interest rates, have rates that change based on a preset margin and a major mortgage index, such as Libor, or with the monthly treasure average (MTA). So when a borrower takes out an adjustable-rate mortgage based on1 1% margin based on Libor, and Libor is at 3% when the mortgages rate changes, the rate of the mortgage will reset at 4%, the sum of the margin and the index.
Floating rate mortgages are uncommon in the United States, although they are still popular in Europe and other foreign places. Loan officers believe they are risky for the consumer because taking out a mortgage is a long term commitment and is a large investment. When a home owner is taking out a loan they need to plan for the future and taking a floating rate mortgage is too unstable to help them plan for future expenses.
Credit cards with floating interest rates
There are many credit cards that utilize floating interest rates. These rates are tied to an index, usually the current prime rate, the rate that reflects the interest rate set by the Fed.
Advantages
An appealing factor of taking a debt instrument with a floating interest rate is that the initial rate is lower than taking a fixed rate tool. With a floating rate instrument the borrower also may pay less in future interest payments if their interest rates decrease. While paying less for their current interest payments they can keep their savings on each payment for if and when the interest rates increase.
What makes adjustable-rate mortgages to home purchasers is that the interest rates in the beginning are lower than fixed rate mortgages. Borrowers who plan to sell the property and repay the loan quickly, before there is much change in rates, will often to choose ARMs.
Disadvantages