Share | S&P 500 Return Calculator - Robert Shiller Long-term Stock Data Use the S&P 500 Return Calculator to compute the total return, annualized return plus a summary of winning (profitable) and losing (unprofitable) buy and sell combinations using S&P 500 monthly price data from Yale University economist Robert Shiller. Prices are from January 1871 through July 2016. Select nominal or real (adjusted for inflation) prices and date information for your analysis. Then click on the Calculate Returns button and your results will be displayed on a new page. S&P 500 Return Calculator - Robert Shiller Long-term Data Price Type: Nominal Real Date Info: Month Year Start Date: Jul Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec End Date: Jul Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Related Calculators Backtesting Stock Market Returns Using the CAPE Calculator S&P 500 Annual Return Calculator Stock Market Follows Multiyear Price Cycles Stock Return Calculator - See returns for the S&P 500 (^GSPC) using price data from Yahoo! Finance.