Index Lookback Calculator
This calculator uses the AG 49 methodology to calculate the historical lookback rate for an index. The historical lookback rate is the average return of over 10,000 25-year sequences of the S&P 500 since 12/31/1956.
This calculator uses the AG 49 methodology to calculate the historical lookback rate for an index. The historical lookback rate is the average return of over 10,000 25-year sequences of the S&P 500 since 12/31/1956.