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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 ?
According to [21], toxicity may not necessarily be associated with a genotoxic effect, because alterations related with the mitotic index, cell death, germination and root growth indicate cytotoxicity, while genotoxicity is indicated by chromosomal alterations.
Patients whose tumors had a mitotic index < 4/10 HPF had a DFS at 80 months of 90% compared to 25% for patients with a higher mitotic index [7].
Torp, "Phosphohistone-H3 proliferation index is superior to mitotic index and MIB-1 expression as a predictor of recurrence in human meningiomas," American Journal of Clinical Pathology, vol.
According to the 2014 criteria of the World Health Organization, moderate--to-significant atypia, high mitotic index, and/or tumor necrosis are required for diagnosing LMS (2).
Interestingly, we found that ctDNA detection was also directly associated with the tumor proliferation rate, measured either by tumor grade (P = 0.003) or mitotic index (P = 0.003).
The majority of the HER2 positive cases had high mitotic index (p = 0.021), defined as >20% positive cells to Ki67/MIB1 antibody.
It also allows the verification of changes in cell division or mitotic index when exposed to chemical compounds with potential cytotoxic action (Carita and Marin-Morales, 2008; Neves et al., 2014).
Parameters Numbers Gender Male 89 Female 81 Age (years) 25-82 (58.27 [+ or -] 10.54) Tumor site (3-30 cm; AVE = 7.1 cm) Stomach 106 Intestine 64 Tumor size (cm) >5 cm 86 [less than or 84 equal to] 5 cm GI bleeding + 63 - 107 T stage T2 85 T3 59 T4 26 M stage Yes 5 No 165 Mitotic index >5/50 HPF 59 [less than or 77 equal to] 5/50 HPF R0 resection Yes 162 No 8 CD117 + 139 - 5 CD34 + 129 - 12 Dog1 + 130 - 5 Adjuvant therapy + 38 - 80 Table 2: Factors associated with gastrointestinal hemorrhage.
Aqueous extract (100%) of thyme reduced mitotic index significantly after 1 day extract treatment (10 mg/ml) in comparison with rest of the extracts.
It was shown that all applications in all experiential series (p<0.05) showed a perceptible decrease in mitotic index, labeling index and cell proliferation.
It was reported in a recent study in which the focus was a series of 346 gastric GISTs, that PDGFR[alpha] mutations occurred in 35% of the tumours, were associated with a lower mitotic index, and had a benign course in more than 80% of cases.