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Statistical composite that measures changes in the economy or in financial markets, often expressed in percentage changes from a base year or from the previous month. Indexes measure the ups and downs of stock, bond, and some commodities markets, in terms of market prices and weighting of companies in the index.


A statistical measure of the value of a certain portfolio of securities. The portfolio may be for a certain class of security, a certain industry, or may include the most important securities in a given market, among other options. The value of an index increases when the aggregate value of the underlying securities increases, and decreases when the aggregate value decreases. An index may track stocks, bonds, mutual funds, and any other security or investment vehicle, including other indices. An index's value may be weighted; for example, securities with higher prices or greater market capitalization may affect the index's value more than others. One of the most prominent examples of an index is the Dow Jones Industrial Average, which is weighted for price and tracks 30 stocks important in American markets.


The relative value of a variable in comparison with itself on a different date. Many security price indicators such as the Standard & Poor's series and the New York Stock Exchange series are constructed as indexes. Also called stock index. See also base period.


To adjust a variable by a selected measure of relative value. For example, it has been proposed that an investor's basis on a security be indexed for changes in consumer prices so that only real increases in value will be taxed. Also called tax indexing. See also subindex.


An index reports changes up or down, usually expressed as points and as a percentage, in a specific financial market, in a number of related markets, or in an economy as a whole.

Each index -- and there are a large number of them -- measures the market or economy it tracks from a specific starting point. That point might be as recent as the previous day or many years in the past.

For those reasons, indexes are often used as performance benchmarks against which to measure the return of investments that resemble those tracked by the index.

A market index may be calculated arithmetically or geometrically. That's one reason two indexes tracking similar markets may report different results. Further, some indexes are weighted and others are not.

Weighting means giving more significance to some elements in the index than to others. For example, a market capitalization weighted index is more influenced by price changes in the stock of its largest companies than by price changes in the stock of its smaller companies.


(1) A statistical indicator that measures changes in the economy in general or in particular areas.An example is the cost-of-living index.(2) A reference point against which measurements are taken for purposes of making future adjustments.An adjustable-rate mortgage might begin with an interest rate of 6 percent and provide that it will increase or decrease in a like percentage as the increase or decrease between today's quoted price for 10-year U.S.Treasury bonds and the price on the loan's annual anniversary date.We would say that 10-year T-bonds are the index.

Some leading loan indices include

• Wall Street Journal prime
• Federal discount rate
• Fed funds rate
• 11th District Cost of Funds
• 10-year Treasuries
• One-year LIBOR

References in periodicals archive ?
But most of the people who voted for Sisi thought that when he said "stability", he really meant an improvement in their living standards, and it's most unlikely that he can deliver that.
Al Qaeda-inspired militant groups based in the Sinai have been waging an insurgency that has gained momentum since Sisi installed a government.
Demonised by Mursi's backers, Al Sisi is, however, idolised by many Egyptians as a national hero and the "prince of hearts".
Abu Sisi, father of six and the husband of a Ukrainian woman, disappeared while traveling between Kiev and the Eastern city of Kharkov on the night of Feb 18-19.
Sisi thanked the king for his support to date support and for his initiative in organizing a donor conference to "provide necessary support in the coming period," MENA reported.
It was also less than the 52 percent turnout secured in the 2012 presidential election by Mohammad Morsi, the Islamist Sisi ousted last year after mass protests against his rule.
Yes, the matter has been decided and I have no choice but to respond to the call of the Egyptian people," Sisi told Kuwait's Al-Seyassah newspaper when asked if he had decided to contest the presidency.
Dirar Abu Sisi has been in isolation since his abduction from Ukraine in 2011.
President Sisi in a military uniform has inaugurated the Unified Command of the East of the Canal to Combat Terrorism- press photo CAIRO - 25 February 2018: In a military uniform, President Abdel Fatah al-Sisi - the head of the Supreme Council of the Armed Forces - inaugurated the Unified Command of East of the Canal To Combat Terrorism on Sunday, according to Presidential Spokesperson Bassam Radi in a statement.
Summary: Supported unquestioningly by Egypt's domestic media, Sisi generates positive headlines during Russia visit.
Abdel Fattah Al Sisi has come under pressure to run from members of the public who reject the government he toppled last year, and from the armed forces who want a president who can face down growing political violence.
PNN On Sunday 6th May, Palestinian Prisoner's Society (PPS) warned of the continuing isolation of prisoner Dirar Abu Sisi who is suffering from a critical health condition in Ohli Kedar Beersheba prison.