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Historical Data - S&P 500 Index Stock Market Investing & Trading System
Companies included in the index are selected by the S&P Index Committee, a team of analysts and economists at Standard & Poor's. The S&P 500 is a market value weighted index - each stock's weight in the index is proportionate to its market value. Part of the index's popularity is due to its close association with the largest mutual fund in the world, the Vanguard 500 Index Fund, and Spiders (AMEX: SPY), the first exchange traded fund (ETF). Market data vendors offer securities professionals and investors a window to trading activity on The NASDAQ Stock Market, American Stock Exchange (Amex), and OTC Bulletin Board (OTCBB). Through vendor services, individuals and corporations may obtain access to real-time quotation, trade, and market summary data for the major global equity and options markets. In addition, vendors offer a variety of value-added services such as market news, historical statistics, company profiles, and analytical research. S&P 500 Index Stocks Data Vendors
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