Annual Percentage Yield - APY

Definition of 'Annual Percentage Yield - APY'


The effective annual rate of return taking into account the effect of compounding interest. APY is calculated by:

Annual Percentage Yield (APY)


The resultant percentage number assumes that funds will remain in the investment vehicle for a full 365 days.

Investopedia explains 'Annual Percentage Yield - APY'




The APY is similar in nature to the annual percentage rate. Its usefulness lies in its ability to standardize varying interest-rate agreements into an annualized percentage number.

For example, suppose you are considering whether to invest in a one-year zero-coupon bond that pays 6% upon maturity or a high-yield money market account that pays 0.5% per month with monthly compounding.

At first glance, the yields appear equal because 12 months multiplied by 0.5% equals 6%. However, when the effects of compounding are included by calculating the APY, we find that the second investment actually yields 6.17%, as 1.005^12-1 = 0.0617.


Filed Under:

comments powered by Disqus
Hot Definitions
  1. Quanto Swap

    A swap with varying combinations of interest rate, currency and equity swap features, where payments are based on the movement of two different countries' interest rates. This is also referred to as a differential or "diff" swap.
  2. Genuine Progress Indicator - GPI

    A metric used to measure the economic growth of a country. It is often considered as a replacement to the more well known gross domestic product (GDP) economic indicator. The GPI indicator takes everything the GDP uses into account, but also adds other figures that represent the cost of the negative effects related to economic activity (such as the cost of crime, cost of ozone depletion and cost of resource depletion, among others).
  3. Accelerated Share Repurchase - ASR

    A specific method by which corporations can repurchase outstanding shares of their stock. The accelerated share repurchase (ASR) is usually accomplished by the corporation purchasing shares of its stock from an investment bank. The investment bank borrows the shares from clients or share lenders and sells them to the company.
  4. Microeconomic Pricing Model

    A model of the way prices are set within a market for a given good. According to this model, prices are set based on the balance of supply and demand in the market. In general, profit incentives are said to resemble an "invisible hand" that guides competing participants to an equilibrium price. The demand curve in this model is determined by consumers attempting to maximize their utility, given their budget.
  5. Centralized Market

    A financial market structure that consists of having all orders routed to one central exchange with no other competing market. The quoted prices of the various securities listed on the exchange represent the only price that is available to investors seeking to buy or sell the specific asset.
  6. Balanced Investment Strategy

    A portfolio allocation and management method aimed at balancing risk and return. Such portfolios are generally divided equally between equities and fixed-income securities.
Trading Center