NASDAQ Composite annual returns begin in 1972; Dow Jones Industrial Average annual returns begin in 1897. Older figures are estimates using December monthly-average prices and reconstructed dividends. Recent daily total returns use ONEQ and DIA ETF proxies. Each index is aligned once with the S&P series at its earliest shared year-end; daily data continues from the annual history. Uncheck the two-year view to see the full history.