A high-yield savings account can look like a financial win when banks advertise rates above 4% or 5%. But many savers discover an uncomfortable truth after opening an account: those eye-catching rates can fall quietly and quickly. Unlike fixed-rate products such as CDs, savings account rates are variable, meaning banks can change them with little warning. If you are relying on interest income to build an emergency fund or fight inflation, understanding how these rate shifts work matters more than ever.
