One one-hundredth of a percent (0.01%); used to express small percentage changes.
A basis point (often abbreviated as "bp" or "bps") is a unit equal to 0.01% or 1/100th of 1%. Basis points are commonly used in finance to express small percentage changes clearly. For example, "the Fed raised rates by 25 basis points" means rates increased by 0.25%, not 25%. When interest rates move from 3.5% to 3.75%, that's a 25-basis-point increase. Using basis points avoids confusion between percentage and percentage-point changes. Understanding basis points is important for tracking interest rate changes, fund fee comparisons, and yield changes.