The S&P 500 (Standard and Poor's 500) [6] is a stock market index tracking the stock performance of 500 companies listed on stock exchanges in the United States that are considered to have large market capitalizations. Start trading with Plus500™ platform: CFDs on Shares, Forex, Commodities, Indices. Fast and efficient trading. Free demo account. Practise with unlimited virtual funds and live market data. Learn the basics of trading or deepen your knowledge with Plus500. Experienced trader? Get real-time stock quotes, news, financial details, and analytics for S&P 500 from Google Finance. Find the latest information on S&P 500 (^GSPC) including data, charts, related news and more from Yahoo Finance SPX | A complete S&P 500 Index index overview by MarketWatch. View stock market news, stock market data and trading information. Trade US Futures on Bitcoin, S&P 500, Oil, and more with Plus500, a global leader with 24/7 customer support at your disposal. S&P 500 Today: Get all information on the S&P 500 Index including historical chart, news and constituents. 500 = 2 2 × 5 3. It is an Achilles number, meaning that it is divisible by the squares of its prime factors (i.e. 4 and 25) but is not a power itself, and a Harshad number, meaning it is divisible by the sum of its digits. Find the latest information on S&P 500 INDEX (^SPX) including data, charts, related news and more from Yahoo Finance.