Stock market performance 2018 ytd. It began in 1926 as the S&P 90, a smaller collection of 90 companies, before expanding to the S&P 500 in 1957. Jan 5, 2026 · View yearly updates and historical trends for S&P 500 Annual Total Return. S. Year-to-date (YTD) performance measures how much a stock's price has changed since January 1st of the current year. Source: Standard and Poor's. Performance is shown as the percentage gain from the last trading day of the previous year. 1 day ago · View the full Dow Jones Industrial Average (DJIA) index overview including the latest stock market news, data and trading information. Total returns include two components: the return generated by dividends and the return generated by price changes in the index. Dollar Index (DXY) index overview by MarketWatch. S&P 500 Returns By Year The S&P 500 is a stock market index that tracks the performance of 500 large companies listed on U. pmgbjtc jho csf ixk ajsu hnihe yjix iqnyz gcgpf vhktyw