Calculates the after-tax return of the S&P 500 index since inceptionProves, with 20 year rolling portfolios going back to the 1957 inception of the S&P 500 index, that forward looking returns display a level of predictability using data points available to investors at the beginning of each periodCompares index fund investors, high net worth investors, college endowments, and the Forbes 400Written by renown name in wealth management: a top 100 Financial Advisor as cited by Barron's, Portfolio Manager of the Year as cited by Portfolio Management Institute and frequent guest on CNBC
