S&P 500 ETFs - Tuesday, August 6 By: TalkMarkets August 06, 2019 at 09:56 AM EDT The S&P 500 index is arguably the most well-known worldwide. It is based on the market cap of the 500 largest companies in the US. Read More >> Related Stocks: S&P 500 ETF Vanguard S&P 500 Ishares Core ETF S&P Depository Receipts