Yahoo! Finance hosts historical pricing data for the Standard and Poor's 500 index dating back to its inception in March 1957, when the price was $44.06 per share. As of July 2015, the price per share was $2,108.57. The index has traded above $1,000 since summer 2009.
The Standard and Poor's 500 Index, commonly called the S&P 500, is an index of the 500 most widely held stocks on the Nasdaq and New York Stock Exchange, according to About.com. As of July 30, 2015, Apple, Microsoft and Exxon Mobil were the three largest companies in the index, according to SPIndicies.com. Only United States-based companies with market capitalizations of $5.3 billion or more with half of their stock available for purchase by the public can be included in the index, states About.com. The minimum share price for inclusion in the S&P 500 is $1.
The index began trading on March 4, 1957, according to SPIndices.com. The S&P 500 was purchased from Standard and Poor's by McGraw Hill in 1966, according to About.com. In 2012, McGraw Hill and S&P licensee CME created the joint venture S&P Dow Jones Indices LLC by combining S&P and Dow Jones indices, according to SPIndices.com. The resulting venture is the largest provider of financial market indices worldwide.