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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 ?
For rTSA patients, 196 patients had a BMI less than 25 (138 female, 58 male) with an average age of 73.
Currently treating more than 6,000 patients a year, BMI The Runnymede Hospital provides private patient services as well as an option for NHS patients to be treated through the choose and book network.
Lufthansa is understood to be considering a break up of the BMI group, which could involve a sale of BMI's no-frills subsidiary bmibaby, the regional division BMI Regional and possibly the group's HQ at Donington Hall near Derby.
Hosted by BMI President & CEO Del Bryant and Delia Orjuela, BMI Vice President, Latin Music, the ceremony also saluted the writers and publishers of the past year's 50 most-performed Latin songs on U.
Under its plan of reorganization, subordinated note holders will receive common stock in BMI, valued at $11 million, against some $43 million in pre-petition debt.
We are pleased to welcome BMI Bank on board," said BFX managing director and chief executive officer Arshad Khan.
Andrew Bainbridge said, 'It was a hard decision for me to leave BMI but I am delighted to hand over to Jamal and am confident that he will continue to focus on our three core pillars of customer service, control and infrastructure to build an ever stronger customer-centric business.
Thus, 37% of patients were misclassified by BMI: 452 were found to be obese by DXA but nonobese by BMI and 12 were obese by BMI but not by DXA.
The researchers compared 41 patients with a BMI of 29.
The BMI President's Award is presented on unique occasions when an individual songwriter or executive has distinctly and profoundly influenced the entertainment industry.
Please note: BMI does not take into account body type and shape and other factors such as bone and muscle mass which can lead to a high reading.