(redirected from Fatigue Index)
Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Encyclopedia.


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 ?
The findings in the present study indicate that both the peak torque and the fatigue index were significantly different in the Kaatsu method (i.
The fatigue index behaved inversely to peak torque.
Previous fatigue index studies of 8 male World and Olympic standard track sprint cyclist revealed that the riders had a fatigue score of 55.
The fatigue test revealed a greater power fatigue index in the BMX riders compared to both track sprinter and endurance mountain bikers.
mean] and fatigue index (n=9) measured in the music and the non-music protocols Parameter Without music With music [P.
001 time (ms) POMS: Profile of Mood States; TMD: total mood D; NS: no-significant difference Table 2: Values of peak and mean power, and the fatigue index recorded during the Wingate test after the ingestion of caffeine or placebo (n=12) Parameter Placebo Caffeine P Value Values of Peak (W x 10.
The running anaerobic sprint test (RAST) variables were peak power (PP), mean (MP) both presented in units relative to body mass (rel) and absolute (abs) values, and also the fatigue index (FI) (FI (%) = (PP - minimal power) x 100) / PP).
The main findings of this study were the weak and non-significant correlations between the RAST and MAOD, including the mean power and fatigue index, which are associated with indices of anaerobic capacity (9,22).
As a result of this training, the fatigue index over the course of the study improved from 17% to 9%.
A low fatigue index was thus indicative of greater fatigue resistance and a high fatigue index indicative of lower fatigue resistance.
A number of investigators since 1987 have reported that peak power tends to increase as resistance setting increases without as much difference with mean power and fatigue index (24,33).
Values were determined every 5 seconds with peak (in the initial 5-s period), mean (30-s), relative peak, relative mean power outputs, and a calculated fatigue index.