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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.
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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.
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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.
Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.


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.

Dictionary of Financial Terms. Copyright © 2008 Lightbulb Press, Inc. All Rights Reserved.


(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

The Complete Real Estate Encyclopedia by Denise L. Evans, JD & O. William Evans, JD. Copyright © 2007 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Caption: Graphical representation of Lipid profile in normal and abnormal BMI group.
BMI is represented by a group of attorneys from Milbank, Tweed, Hadley & McCloy LLP.
Therefore it is possible that women with high BMI are more likely to be induced at poor bishop.
The acquisition opens up the individual product and service offerings of Cognition and BMi Research to clients across both companies.
For rTSA patients, no significant difference was noted in all ROM dimensions measured except for IR, when comparing absolute preoperative ROM or postoperative ROM measurements between those with BMI less than 25 and those with BMI greater than 35.
With added weight comes added health implications and as a person's BMI increases the risk of various health-related problems does too.
He added: 'bmi regional now has the agility of a start-up business with the heritage of a great brand, whilst continuing to deliver a quality offering to our customers across eight European countries.
"If raised BMI truly is a causal factor in the development of gallstone disease, genetic variants that increase BMI would be expected to also increase risk of gallstone disease," said Dr.
The money will be used to fund a new shaded area for BMI's outdoor swimming pool in Isa Town.
Compared with a normal BMI, hazard ratios for all-cause mortality were 0.94 (95% CI 0.91 - 0.96) for overweight, 1.18 (1.12 - 1.25) for obesity overall (BMI [greater than or equal to]30), 0.95 (0.88 - 1.01) for grade 1 obesity (BMI 30 - <35), and 1.29 (1.18 - 1.41) for grades 2 and 3 obesity (BMI [greater than or equal to]35).
International Airlines Group (IAG) on Thursday announced that it has reached a binding agreement with Deutsche Lufthansa for IAG to acquire British Midland Limited (bmi).