The SPDR Dow Jones Industrial Average ETF (Ticker: DIA) seeks to provide investment results that, before expenses, generally correspond to the performance of the Dow Jones Industrial Average (DJIA). The price weighted Dow Jones Averages were the world's first fundamentally weighted market indicators. The DJIA consists of 30 U.S. listed stocks that produce goods or provides services other than transportation and utility. The definition of industrial is kept intentionally broad to provide an indicator that reflects the performance of the entire U.S. economy. Constituents are selected by the editors of The Wall Street Journal. A stock typically is added only if the company is widely known, demonstrates sustained growth, is of interest to a large number of investors, and accurately represents a market sector covered by the average. Composition changes are rare and generally occur following corporate acquisitions or other dramatic shifts in a component company's core business. When such an event necessitates that one component be replaced the entire index is reviewed. Thus, several component changes are often implemented simultaneously. The DJIA is the second oldest continuous barometer of the U.S. stock market. The indicators value is calculated by adding the component stock prices and dividing by the number of components. A 'divisor' adjusts the effects of stock splits and other composition changes.