Any mix of stocks, ETFs and funds since 1962.
Up to five portfolios backtested side by side.
Any two funds or stocks side by side.
Best weights, checked on later years.
How often a lump sum beat spreading it out.
Compound growth at a fixed return.
Deposits or withdrawals, after inflation.
What a stock, ETF or fund returned.
S&P 500 returns from any month since 1871.
Years it took to retire early, since 1872.
Safe withdrawal rates since 1872.