Common
Index (economics)
Statistical measure of change
Index (economics)
In economics, statistics, and finance, an index is a number that measures how a group of related data points—like prices, company performance, productivity, or employment—changes over time to track different aspects of economic health from various sources. Consumer-focused indices include the Consumer Price Index (CPI), which shows how retail prices for goods and services shift in a fixed area, aiding adjustments to salaries, bond interest rates, and tax thresholds for inflation. The cost-of-living index (COLI) compares living expenses over time or across places. The Economist’s Big Mac Index uses a Big Mac's cost to explore currency values and purchasing power. Market performance indices track trends like company value or employment. Stock market indices include the Dow Jones Industrial Average and S&P 500, which primarily cover U.S. firms. The Global Dow and NASDAQ Composite monitor major companies worldwide. Commodity indices track goods like oil or gold. Bond indices follow debt markets...
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