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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 ?
The isolated and remote Lut Desert was therefore an ideal expedition staging zone.
Initially 8 odd values are stored in LUT and 2A is stored as a ninth value.
Also, no free LUT could be detected in plasma or urine prior to enzymatic hydrolysis of conjugates.
In LUT based coarse-grain controller, a large number of lookup tables share a single sleep controller so the area and power overheads of the sleep controller are relatively small.
New study with Bagheri and et al that has done on tectonic of east lut in Neh bundan area recommend some tectonitratigraphicterrene, that Dehsalm metamorphic complex introduced as an accretianry prism.
The structure of a DDS system using a ROM LUT is shown in figure 3.
Approval of the LRIP extension and continuing with the planning for the LUT was granted.
The Earth's hot deserts - such as the Sahara, the Gobi, the Sonoran and the Lut - are climatically harsh and so remote that access for routine measurements and maintenance of a weather station is impractical," researcher David Mildrexler said.
The ruling that the Lut outranks Death Valley--and by a long shot--comes from data collected over several years by a NASA satellite.
Preparations for the LUT are ongoing by ATEC's Operational Test Command, PdM NetOps-CF, the Joint Staff J6, the U.