APY (Annual Percentage Yield)
The yearly return on savings or investments, accounting for compounding.
APY is the effective annual return on a deposit or investment once compounding is taken into account. Two accounts with the same nominal rate but different compounding frequencies will have different APYs.
APY is the savings-side mirror of APR: APR is what you pay to borrow, APY is what you earn to save. A higher APY means more interest earned over a year.