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Index

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.
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

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.
Farlex Financial Dictionary. © 2012 Farlex, Inc. All Rights Reserved

index

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.

index

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.

Index.

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.

index

(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 ?
Convergent validity of the KINAP was assessed by comparison with another measure of kinesiophobia (Tampa Scale for Kinesiophobia (TSK)) and with measures of two different but related concepts, functional disability (Oswestry Disability Index) and pain intensity.
However, the assessment of massage effectiveness performed with functional questionnaires, the Roland-Morris Questionnaire and the Oswestry Disability Index, showed a small improvement in the functionality of patients with low back pain, and these results were not statistically significant.
Experimental (n = 12) Control (n = 12) pre 9.25 (1.66) 9.33 (2.57) WB post 5.83 (2.44) 4.25 (2.45) (%) change -3.42 (2.97) -5.08 (3.00) (95% CI) (-1.53 - -5.30) (-3.18 - -6.99) pre 4.58 (.90) 4.92 (.90) VAS post 2.75 (.75) * 3.08 (.79) * (scores) change -1.83 (.58) -1.83 (.72) (95% CI) (-1.47 - -2.20) (-1.38 - -2.29) pre 26.33 (2.81) 25.25 (3.44) ODI post 6.42 (2.23) * 11.00 (6.24) (scores) change -19.92 (2.91) ([dagger]) -14.25 (7.49) (95% CI) (-18.07 - -21.76) (-9.49 - -19.01) VAS: Visual analog scale, ODI: Oswestry disability index, WB: Weight bearing, CI: Confidence intervals.
Males Variable (n = 20) Age (yr) Range 40-63 Mean [+ or -] SD 50.80 [+ or -] 8.77 Time Since Pain Onset (mo) Range 4-24 Mean [+ or -] SD 11.6 [+ or -] 5.6 Oswestry Disability Index (%) Range 20.2-38.0 Mean [+ or -] SD 18.3 [+ or -] 10.9 Females Variable (n = 24) t-Value p-Value Age (yr) -0.52 0.60 Range 26-64 -- -- Mean [+ or -] SD 49.29 [+ or -] 10.00 -- -- Time Since Pain Onset (mo) -0.76 0.45 Range 39,920 -- -- Mean [+ or -] SD 10.4 [+ or -] 3.9 -- -- Oswestry Disability Index (%) 0.59 0.55 Range 20.0-36.1 -- -- Mean [+ or -] SD 20.4 [+ or -] 9.4 -- -- SD = standard deviation.
Power and Sample Size Software (PASS; NCSS, Utah, USA) was used to calculate the sample size taking into account the difference between the Oswestry Disability Index (ODI) means (5 units) and standard deviation (6 units) at first week and alpha error (p<0.05) between the intervention group and the placebo group.
All patients included in the study were assessed clinically with a structured questionnaire, namely the Oswestry disability index. (3) detailed physical examination was done and the defect was confirmed radiologically.
In the last patient visit, performed 23 months after surgery, he was completely asymptomatic and Oswestry disability index improved to 2% (compared with 36% preoperatively).
The Oswestry Disability Index (ODI) was used to assess disability-related to lumbar spine degeneration, and patient satisfaction was assessed using the modified MacNab criteria.
Overall, patients from all three treatment groups had a clinically significant and comparable decrease in low back and leg pain, assessed on the Visual Analogue Scale and functional improvement, assessed by the Oswestry Disability Index questionnaire.
Keywords: Natural Mineral Water, Lumbar Spondylarthrosis, Visual Analogue Scale, SF36, Oswestry Disability Index
Visual analogue scale (VAS) was used to measure the intensity of pain, and the Oswestry Disability Index (ODI) was used to assess the disability of the patients on daily living activities.