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Price index. A price index ( plural: "price indices" or "price indexes") is a normalized average (typically a weighted average) of price relatives for a given class of goods or services in a given region, during a given interval of time. It is a statistic designed to help to compare how these price relatives, taken as a whole, differ between ...
An index number is an economic data figure reflecting price or quantity compared with a standard or base value. [ 5][ 6] The base usually equals 100 and the index number is usually expressed as 100 times the ratio to the base value. For example, if a commodity costs twice as much in 1970 as it did in 1960, its index number would be 200 relative ...
Index (statistics) In statistics and research design, an index is a composite statistic – a measure of changes in a representative group of individual data points, or in other words, a compound measure that aggregates multiple indicators. [ 1][ 2] Indexes – also known as composite indicators – summarize and rank specific observations. [ 2]
A consumer price index ( CPI) is a price index, the price of a weighted average market basket of consumer goods and services purchased by households. Changes in measured CPI track changes in prices over time. [1] The CPI is calculated by using a representative basket of goods and services. The basket is updated periodically to reflect changes ...
The NASDAQ spiked during the dot-com bubble in the late 1990s, a result of the large number of technology companies on that index. In finance, a stock index, or stock market index, is an index that measures the performance of a stock market, or of a subset of a stock market. It helps investors compare current stock price levels with past prices ...
The glycemic (glycaemic) index ( GI; / ɡlaɪˈsiːmɪk / [1]) is a number from 0 to 100 assigned to a food, with pure glucose arbitrarily given the value of 100, which represents the relative rise in the blood glucose level two hours after consuming that food. [2] The GI of a specific food depends primarily on the quantity and type of ...
The United States Consumer Price Index ( CPI) is a family of various consumer price indices published monthly by the United States Bureau of Labor Statistics (BLS). The most commonly used indices are the CPI-U and the CPI-W, though many alternative versions exist for different uses. For example, the CPI-U is the most popularly cited measure of ...
The U.S. Dollar Index ( USDX, DXY, DX, or, informally, the "Dixie") is an index (or measure) of the value of the United States dollar relative to a basket of foreign currencies, [1] often referred to as a basket of U.S. trade partners' currencies. [2] The Index goes up when the U.S. dollar gains "strength" (value) when compared to other currencies.