This is a very easy question esspecially if you already have spreadsheets.

how can you use microsoft excel to analyze rates of return for S&P 500 and when would be the best time for you to invest your money inside the S&P 500. please give explanations. you can use models, equations, and simply type give a brief presentation on how to invest inside the S&P 500 efficiently. Must use atleast 1 VLOOKUP function and use a forecasting model.