[S&P 500 Price-to-Sales Ratio Hits All-Time High] BlockBeats News, July 16, according to Barchart data, the S&P 500 Index Price-to-Sales Ratio has currently risen to an all-time high. This metric is used to measure the price investors are willing to pay for each unit of a company's sales revenue, and the current level reflects that the overall valuation of U.S. stocks is at a historical peak. [Original Link]