Unlike a fixed interest rate, which remains constant, a variable interest rate can change over time. Most credit cards have variable interest rates tied to the U.S. prime rate or a similar benchmark.

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Some recent research has suggested that macroeconomic variables, such as output and inflation, can improve interest rate forecasts. However, the evidence for this puzzling result is based on ...

With a fixed-rate mortgage, your interest rate and payments won’t change during your mortgage term. But they might if you opt for a variable-rate mortgage. Many or all of the products on this page are ...