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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.

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.

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.

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.

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

References in periodicals archive ?
Comparative evaluation of the Datex-Ohmeda S/5 Entropy Module and the Bispectral Index monitor during propofolremifentanil anesthesia.
Falsely increased bispectral index during endoscopic shoulder surgery attributed to interferences with the endoscopic shaver device.
Effects of fentanyl, alfentanil, remifentanil and sufentanil on loss of consciousness and bispectral index during propofol induction of anaesthesia.
Effects of clonidine and midazolam premedication on bispectral index and recovery after elective surgery.
Is the bispectral index appropriate for monitoring the sedation level of mechanically ventilated surgical ICU patients Intensive Care Med 2002; 28: 178-83.
Evaluation of the clinical application of bispectral index (BIS) to measure anaesthesia depth in tortoises.
Bispectral index monitoring--processed electroencephalogram signals used to measure sedation depth on a unitless scale from 0 to 100 (40 to 60=general anaesthesia; 60 to 90=sedation; 100=awake)
Bispectral index monitoring may not reliably indicate cerebral ischemia during awake carotid endarterectomy.
Clinical effectiveness and cost-effectiveness of depth of anaesthesia monitoring (E-Entropy Bispectral Index and Narcotrend): a systematic review and economic evaluation.
Due to the carelessness of the authors, in the article, "Comparison of C [sub]50 for Propofol-remifentanil Target-controlled Infusion and Bispectral Index at Loss of Consciousness and Response to Painful Stimulus in Elderly and Young Patients", which appeared in the pages 1994-1999, Issue 15, Vol 128 of Chinese Medical Journal , [sup][1] the word "Weight, kg" in [Table 1] under the first column is incorrectly written instead of "Age, years".
THE BISPECTRAL INDEX: The Bispectral Index (BIS Index) offers the anaesthesiologist a direct and accurate method for continuous brain status monitoring, the hypnotic effect of anaesthesia.