**Interest** is a fee paid by a borrower of assets to the owner as a form of compensation for the use of the assets. It is most commonly the price paid for the use of borrowed money, or money earned by deposited funds.

When money is borrowed, interest is typically paid to the lender as a percentage of the principal, the amount owed to the lender. The percentage of the principal that is paid as a fee over a certain period of time (typically one month or year) is called the interest rate. A bank deposit will earn interest because the bank is paying for the use of the deposited funds. Assets that are sometimes lent with interest include money, shares, consumer goods through hire purchase, major assets such as aircraft, and even entire factories in finance lease arrangements. The interest is calculated upon the value of the assets in the same manner as upon money.

Interest is compensation to the lender, for a) risk of principal loss, called credit risk; and b) forgoing other investments that could have been made with the loaned asset. These forgone investments are known as the opportunity cost. Instead of the lender using the assets directly, they are advanced to the borrower. The borrower then enjoys the benefit of using the assets ahead of the effort required to pay for them, while the lender enjoys the benefit of the fee paid by the borrower for the privilege. In economics, interest is considered the price of credit.

Interest is often compounded, which means that interest is earned on prior interest in addition to the principal. The total amount of debt grows exponentially, most notably when compounded at infinitesimally small intervals, and its mathematical study led to the discovery of the number *e*. However, in practice, interest is most often calculated on a daily, monthly, or yearly basis, and its impact is influenced greatly by its compounding rate.

Read more about Interest: History of Interest, Market Interest Rates, Interest in Mathematics, Formulae

### Other articles related to "interest":

**Interest**Rate Future - STIRS

... A short-term

**interest**rate (STIR) future is a futures contract that derives its value from the

**interest**rate at maturation ... Common short-term

**interest**rate futures are Eurodollar, Euribor, Euroyen, Short Sterling and Euroswiss, which are calculated on LIBOR at settlement, with the exception of Euribor which is based on Euribor ... This value is calculated as 100 minus the

**interest**rate ...

**Interest**

... In addition to sports, astronomy is also Dr ... Chung's interest ...

**Interest**- Formulae

... monthly payments is augmented by the monthly

**interest**charge and decreased by the payment so , where i = loan rate/100 = annual rate in decimal form (e.g ... be used to calculate the monthly payment of a loan An

**interest**-only payment on the current balance would be ... The total

**interest**, IT, paid on the loan is ...

... the Fisher equation is the relationship between nominal and real

**interest**rates, through inflation, and the percentage change in the price level between two time periods ... So assume someone buys a $1 bond in period t while the

**interest**rate is ... from the bond is therefore From here the nominal

**interest**rate can be solved for ...

**Interest**Rate Market

... The ASX

**interest**rate market is the set of corporate bonds, floating rate notes, and bond-like preference shares listed on the exchange ... shares, but the ASX provides information such as their maturity, effective

**interest**rate, etc ...

### Famous quotes containing the word interest:

“There is not a subject in which I take a deeper *interest* than I do in the development of Alaska, and I propose, if Congress will follow by recommendations, to do something in that territory that will make it move on.”

—William Howard Taft (1857–1930)

“Treading the soil of the moon, palpating its pebbles, tasting the panic and splendor of the event, feeling in the pit of one’s stomach the separation from terra ... these form the most romantic sensation an explorer has ever known ... this is the only thing I can say about the matter. The utilitarian results do not *interest* me.”

—Vladimir Nabokov (1899–1977)

“You do not mean by mystery what a Catholic does. You mean an interesting uncertainty: the uncertainty ceasing *interest* ceases also.... But a Catholic by mystery means an incomprehensible certainty: without certainty, without formulation there is no *interest*;... the clearer the formulation the greater the *interest*.”

—Gerard Manley Hopkins (1844–1889)