Tools
Calculators and market tools for the questions the blogs keep coming back to. They run in your browser and nothing you enter leaves it.
FIRE calculator
Your FIRE number, your date, a Coast FIRE figure and the levers that bring the date closer.
Open →Fund fee drag
Two funds, one return, two cost levels. See the euros that compounding moves from your pocket to the fund company.
Open →Safe withdrawal rate
Test the 4% rule. Every retirement start since 1926, and the largest withdrawal that lasted.
Open →Portfolio backtest
Famous portfolios or your own mix, on monthly data since 1926: growth, volatility and the worst drop.
Open →Goal finder
Name a yearly return and a number of years, and see which portfolios delivered it and how often.
Open →Eras of history
How each portfolio fared in 1929, the inflation years, the dot-com bust, 2008 and 2022.
Open →Market indicators
S&P 500, Dow, Nasdaq, bitcoin, ether and oil against their 200-day average.
Open →Superinvestor portfolios
What ten famous investors own, bought and sold in their latest filings, and which stocks several hold.
Open →Rule-based strategies
Trend and momentum rules tested against buy and hold and 60/40 since 1927.
Open →