This is the last installment of S&P 500 Index Rolling Returns series.
The average 30-year rolling total return for the S&P 500 starting with 1926, is 2,478% or 11.21% annualized (geometric mean). There were several 30-year periods that had annual returns between 8% and 10%. Also, these numbers are not adjusted for the CPI, which would have a significant negative impact on the end results (perhaps another AFM series?).
Here are links to the other posts in this series:
S&P 500 Annual Returns 1926 – November 2015
S&P 500 5-Year Rolling Total Returns
S&P 500 10-Year Rolling Total Returns
S&P 500 20-Year Rolling Total Returns