S&P Dow Jones Indices, Standard & Poor's (US). S&P 500 Index (US): S & P 500 Index (US) - Close, 01/1950 - 04/2015. Data-Planet™ Statistical Datasets by Conquest Systems, Inc. Dataset-ID: 041-001-001
Dataset: Reports the value of the S&P 500 Index at market's close.
The S&P 500 is a capitalization-weighted index of 500 United States large cap firms. While it focuses on the large-cap sector of the market, since it includes a significant portion of the total value of the market, the index also represents the equities market as a whole. To be included, a company must have an unadjusted market capitalization of US$ 4.6 billion or more.
http://www.spindices.com/
Category: Banking, Finance, and Insurance
Subject: Publicly Traded Companies, Stock Prices, Stock Markets, Stocks, Stock Indexes
Source: Standard & Poor's (US)
A division within McGraw-Hill, Standard & Poor’s (S&P) provides credit ratings, investment research, risk assessment, and equities indexes.
http://www2.standardandpoors.com/